Trick Flow® SBC Heads: The Ultimate Upgrade For Your Engine
Upgrade your SBC with Trick Flow. Compare DHC 175, DHC 200, and Super 23 215 cylinder heads to find the perfect airflow for your build.
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For generations, the Small Block Chevy (SBC) has reigned supreme as the go-to engine for hot rodders, racers, and restoration enthusiasts. Its versatility is unmatched, but even the best factory engines have their limits, especially when it comes to airflow.
If you’re looking to unlock the true potential of your SBC, the secret lies in the cylinder heads. Some Trick Flow models are also CARB E.O. compliant for specific years and engines, making them a wise choice for those needing to meet emissions requirements.
Trick Flow Specialties has long been a heavyweight champion in the world of high-performance airflow. Known for their rigorous engineering and advanced manufacturing techniques, Trick Flow® offers a range of cylinder heads for small-block Chevy engines designed to breathe new life into your engine.
Guys in the community love Trick Flow for its reputation and performance, often sharing stories about their builds and the reliability these heads deliver. Whether you are chasing that vintage “double hump” look for a restoration or seeking aggressive horsepower for the track, there is a Trick Flow® head built for your build.
In this guide, we will explore the engineering marvels behind Trick Flow’s top offerings for the Small Block Chevy, explicitly focusing on the DHC™ 175, DHC™ 200, and Super 23® 215 series. We’ll break down the specs, compare the models, and help you decide which cylinder head is the perfect match for your horsepower goals. Enthusiasts often seek advice and information from experienced guys when choosing Trick Flow SBC heads, ensuring they get the best performance and reliability for their project.
Trick Flow® DHC™ 175 Cylinder Heads for Small Block Chevrolet TFS-30210006
Trick Flow® DHC™ 175 cylinder heads are available fully assembled or as bare castings. Sold individually.
Trick Flow® DHC™ 175: Vintage Looks, Modern Power
For many enthusiasts, the aesthetic of the engine bay is just as important as the performance. This is where the Trick Flow® DHC™ 175 Cylinder Heads shine. These aluminum heads are engineered to bridge the gap between classic styling and modern performance technology, providing enhanced throttle response and efficiency compared to stock heads.
The “DHC” stands for “Double Hump Casting,” a direct nod to the legendary factory performance heads of the 1960s (castings 186, 291, 461, and 462). Trick Flow® has faithfully recreated the exterior appearance of these iconic heads, right down to the straight spark plug holes, while completely redesigning the internal architecture for superior power.
Key Features of the DHC™ 175 Series
The DHC™ 175 heads (specifically part numbers TFS-30210006 and TFS-30210003) are cast from premium A356-T61 aluminum. This material choice significantly reduces weight compared to factory iron heads while offering excellent heat dissipation.
Internally, these heads feature 60cc combustion chambers that are CNC-profiled. This precision machining ensures consistent volume across all cylinders, which is critical for smooth engine operation and balanced compression.
The intake runners are where the magic happens. At 175cc, these runners are finished with Trick Flow’s "Fast As Cast®" process. This technology duplicates the runner profile of a fully CNC-ported head but creates it directly in the casting mold. The result is near-CNC performance at a much more accessible price point.
Notable Specifications:
- Material: Cast Aluminum (A356-T61)
- Combustion Chamber Volume: 60cc
- Intake Runner Volume: 175cc
- Intake/Exhaust Valve Diameter: 2.020 in. / 1.600 in.
- Valve Angles: 23 degrees
Why choose DHC™ 175?
The primary benefit of the DHC™ 175 is the ability to run unleaded fuel without fear of valve seat recession, a common issue with original vintage iron heads. Trick Flow® installs ductile iron valve seats and bronze alloy valve guides to ensure good durability with modern pump gas. A good practice is to have new Trick Flow heads inspected by a reputable machine shop before installation to avoid potential issues and ensure everything is set up correctly.
Furthermore, the Fast As Cast® runners and CNC-blended bowl work under the valves promote excellent low-RPM torque while still allowing the engine to breathe freely at high RPMs. This makes them an ideal choice for street rods and muscle cars where drivability is key.
Comparing the Models: TFS-30210006 vs. TFS-30210003
While both models share the same DHC™ 175 architecture, there are distinct differences regarding compatibility, setup, and the changes required during installation:
TFS-30210006: This model is designed for setups requiring accessory bolt holes (common on 1969 and later engines). It comes equipped with 1.470-inch single valve springs tailored for hydraulic flat tappet camshafts, accommodating up to 0.540 inches of valve lift. The change in setup for this head includes ensuring proper alignment with original accessories and verifying cam compatibility, as installation may require inspection and minor adjustments to achieve optimal performance.
TFS-30210003: This version offers a cleaner look for earlier builds, as it does not include accessory bolt holes (replicating the pre-1969 style). It is upgraded with 1.460-inch dual valve springs designed for hydraulic roller camshafts, capable of handling up to 0.600 inches of valve lift. The change here involves confirming compatibility with the intended camshaft and recognizing that the lack of accessory bolt holes may affect installation on later engines, requiring attention to setup details.
Trick Flow® DHC™ 200 Cylinder Heads for Small Block Chevrolet TFS-30210003-C00
New 64cc CNC-profiled combustion chambers with 2.055 in. intake valves and CNC Street Ported runners promote big increases in high-RPM horsepower and torque.
Trick Flow® DHC™ 200: Stepping Up the Performance
If the DHC™ 175 is about modernizing a classic, the Trick Flow® DHC™ 200 Cylinder Heads are about pushing that classic look to its absolute performance limit. These heads take the successful DHC blueprint and give it the full “CNC Street Ported” treatment.
Port design is a critical factor in the DHC™ 200 heads, with carefully engineered intake and exhaust ports that maximize airflow and performance for high-horsepower applications. The DHC™ 200 series (part numbers TFS-30210003-C00 and TFS-30210007-C00) is designed for enthusiasts who want the “sleeper” look of a double-hump head but need the airflow to support a high-horsepower stroker engine or a high-RPM screamer. These heads feature extra-thick walls for added durability and are available fully assembled or as bare castings to suit different build preferences.
Advanced CNC Machining
Unlike the 175 series, which relies on the Fast As Cast® process, the DHC™ 200 heads feature fully CNC-machined intake and exhaust runners. The intake runner volume is increased to 200cc, allowing for a significantly larger volume of air and fuel to enter the combustion chamber.
The combustion chambers are slightly larger at 64cc and are also fully CNC-profiled to maximize flow efficiency and combustion stability. The intake valve angle, set at 23 degrees, is engineered to optimize airflow and combustion efficiency by improving valve shrouding and compatibility with various cam profiles. To complement the increased airflow, Trick Flow® stepped up the intake valve size to 2.055 inches. These Trick Flow Super 23 cylinder heads are designed for use with mechanical flat tappet or hydraulic roller camshafts.
Notable Specifications:
- Combustion Chamber Volume: 64cc
- Intake Runner Volume: 200cc
- Intake Valve Diameter: 2.055 in.
- Springs: 1.460 in. Dual Springs (rated for 0.600 in. lift)
- Retainers: Chromoly Steel
Performance Benefits
The DHC™ 200 is built for power. The proprietary valve profiles and multi-angle valve seat machining are optimized to maximize flow even at low lift, ensuring snappy throttle response. However, the 200cc runners really shine in the upper RPM range, where the engine demands massive amounts of air.
The DHC 200 heads support different power levels depending on engine setup, making them versatile for a range of high-performance applications. Key features include a 67cc combustion chamber volume and a D-port exhaust shape, both of which contribute to improved airflow and efficient combustion.
Like the 175 series, these heads feature extra-thick decks and walls. This adds rigidity to the casting, which is essential for preventing gasket failure under high cylinder pressures.
Comparing the Models: C00 vs. C00 (Accessory Holes)
Similar to the 175 series, the primary difference between the two DHC™ 200 models lies in the accessory mounting:
TFS-30210003-C00This unit features no accessory bolt holes, making it the perfect choice for early-model restorations or custom hot rods where a clean, uncluttered front face is desired. In cases where accessory mounting is not required, this model is the better fit.
TFS-30210007-C00This unit includes accessory bolt holes, allowing for the easy mounting of alternators and power steering brackets found on later model Small Block Chevys. In cases where you need to retain factory accessories, this model is preferable.
Trick Flow® Super 23® 215 Cylinder Heads for Small Block Chevrolet TFS-32410006
Super 23® 215 heads with one of two valve spring packages for different camshaft types and power levels. The standard 1.545" valve springs are perfect for most hydraulic roller cams. For more aggressive solid-roller cam profiles, choose the optional 1.550" valve springs for better control at high RPMs.
Trick Flow® Super 23® 215: The Race-Ready Powerhouse
When vintage aesthetics take a backseat to pure, unadulterated performance, the Trick Flow® Super 23® 215 Cylinder Heads (TFS-32410006) enter the conversation. These trick flow heads are available fully assembled or as bare castings, making them a convenient choice for builders who want plug-and-play solutions or prefer to customize their setup.
The 215cc intake runners provide strong mid- and high-RPM power, making them ideal for performance applications. The Super 23® series also includes the 195 version, which is designed for 302 to 406 cubic inch engines. Both versions feature angled spark plugs and raised valve cover rails for improved performance and compatibility.
Trick Flow SBC heads are a trusted brand and are available for purchase from various retailers, including Trick Flow's official website and Summit Racing. Due to high demand for this brand, some users have experienced order issues, so timely procurement is important to avoid delays in engine builds.
The Super 23® series is a mainstay in the high-performance Chevy world, and the 215 version represents the pinnacle of this line. It features a new and improved casting with a thicker 3/4-inch deck for extreme durability.
Maximum Airflow Engineering
The “215” refers to the massive 215cc intake runners. These runners feature Trick Flow’s premium CNC Competition Ported treatment. The exceptional design of the intake and exhaust ports maximizes airflow, with careful attention to port shape and finish for superior performance. This high-resolution surface finish reduces air resistance to an absolute minimum, allowing race-ready engines to breathe deeply and produce serious horsepower.
To handle this increased airflow, the Super 23® 215 is equipped with massive 2.080-inch intake valves. The spark plugs are angled (rather than straight like the DHC models) to improve combustion efficiency and header clearance. A key specification is the maximum valve lift of 0.680 inches, ensuring compatibility with high-performance camshafts.
Notable Specifications:
- Intake Runner Volume: 215cc
- Combustion Chamber Volume: 67cc
- Intake Valve Diameter: 2.080 in.
- Valve Springs: 1.550 in. Dual Springs (rated for 0.680 in. lift)
- Spark Plug Style: Angle
- Camshaft Compatibility: Hydraulic Roller / Solid Flat Tappet
Who needs the Super 23® 215?
This head is designed for aggressive builds. The Super 23® 215 has its place in high-performance or racing engine builds, especially when maximum airflow and power are required. If you are running a large displacement stroker engine (like a 383 or 406) or a high-RPM drag racing setup, the Super 23® 215 is your best option.
The included valve springs are substantial, capable of handling up to 0.680 inches of valve lift. This makes them compatible with aggressive solid roller cam profiles that would overwhelm standard street springs. Additionally, the raised valve cover rails ensure there is plenty of clearance for aftermarket rocker arms and stud girdles.
Installation and Compatibility
Upgrading cylinder heads is a significant job, but Trick Flow® designs its products to minimize headaches. However, it is important to understand that problems can happen if new heads are not properly inspected before installation. Even heads received straight from the box may require changes or additional work, such as correcting tight valves or seat issues, which means engine reliability could be compromised if these issues are not addressed.
Quality control for Trick Flow SBC heads has been reported to be inconsistent, and some users have expressed disappointment that the heads are not always ready to bolt on at the price point. It is common practice to pay for a reputable machine shop to check and professionally set up new heads before installation, as several users have received heads that needed significant work right out of the box. This extra step helps avoid costly problems and ensures optimal performance.
When purchasing Trick Flow SBC heads, shipping options can vary by retailer. Some sellers offer free shipping on orders over a certain amount, so it is recommended to check the seller’s website or contact them via email for specific shipping details and availability before you buy.
Here are a few installation tips and compatibility notes for these Small Block Chevy heads:
- Minimum Bore Size: All the heads discussed here (DHC™ 175, DHC™ 200, and Super 23® 215) require a minimum cylinder bore diameter of 4.000 inches. They are not compatible with smaller bore engines like the 305 or 283.
- Pushrods: The DHC series heads use standard pushrod locations, but due to the guideplates, you must use hardened pushrods. Always measure for proper pushrod length when changing heads or camshafts.
- Pistons: When using the Super 23® 215 with its large 2.080-inch intake valves, it is crucial to check piston-to-valve clearance. The large valves may interfere with standard piston reliefs depending on your camshaft specs.
- Head Gaskets: For the Super 23® 215, specific head gaskets with a 4.155-inch bore diameter are required to match the combustion chamber shape.
What Customers Are Saying The Trick Flow® Heads
The proof, as they say, is in the horsepower. The Trick Flow® DHC™ 175 (TFS-30210006) currently holds a stellar 4.75 out of 5 stars rating. Users praise the excellent casting quality and the perfect blend of vintage looks with modern performance. Has anybody else had similar luck with Trick Flow heads? Some users have found the quality to be pretty inconsistent, with occasional issues reported. Additionally, some retailers are reporting low stock levels for Trick Flow SBC heads, so if they're out of stock, alternatives from other brands like Dart may be worth considering.
Similarly, the Trick Flow® Super 23® 215 (TFS-32410006) boasts a perfect 5 out of 5 stars. Reviewers highlight the massive power gains on stroker engines and the high quality of the included hardware, such as the chromoly retainers and 10-degree locks.
Enhancing Your Small Block Chevy's Performance
Choosing the right cylinder head is a critical step in achieving your engine-building goals. It’s not just about slapping on a part; it’s about balancing performance, reliability, and cost while understanding the nuances of the engine-building business. For small-block Chevrolet (SBC) enthusiasts, Trick Flow SBC heads are often a top recommendation.
Expert Engine builders frequently highlight their consistent quality control, impressive flow numbers, and ability to deliver high RPM horsepower. Whether you’re building a motor for the street or the strip, these heads are a solid choice for ultimate bolt-on performance. However, always verify your selected choices with a reputable source before purchasing to ensure they align with your specific needs.
When it comes to maximizing performance, pairing the right cylinder head with a compatible intake manifold and cam choice is essential. Trick Flow SBC heads, particularly the Twisted Wedge series, are known for their innovative design and ability to deliver more power. These heads are often sold individually and come fast-as-cast assembled, making them a convenient option for builders.
For those looking to push the limits, additional port work or a professional valve job can further enhance flow numbers and unlock even more power. A flow bench test can provide valuable insights into how these modifications impact performance, helping you make informed decisions about your current choices.
Timing is everything in engine building, and stock order parts like these can sell out quickly. If you’re considering a custom order part, it’s wise to act fast, as the estimated ship date for in-demand items like Trick Flow SBC heads could vary. For those on a budget, a decent head with minimal port work can still provide significant gains, especially when paired with the right supporting components. Keep in mind that the cost of putting together a high-performance small Chevy engine can add up, so selecting reputable brands and trusted machine shops is crucial for long-term reliability.
Finally, don’t overlook the small details that can make or break your build. Type filters, screws, and other seemingly minor components play a significant role in ensuring everything fits and functions as intended. Whether you’re pulling together a stock rebuild or chasing high RPM horsepower, the right combination of parts and expertise can transform your small block Chevrolet into a powerhouse. For more details and a direct comparison of Trick Flow SBC heads, check out this link and explore how they can elevate your engine’s performance.
- For the Restoration Purist: If you want a daily-drivable street car that looks like it just rolled out of the factory in 1966, but blows the doors off stock muscle cars, the DHC™ 175 is your ideal match.
- For the “Sleeper” Builder: If you want that same vintage look but are planning a more aggressive engine build that needs serious air, the DHC™ 200 offers the stealthy appearance you want with the CNC-ported power you need.
- For the Racer: If you are chasing time slips and maximum dyno numbers, and you aren’t concerned with looking “stock,” the Super 23® 215 provides the massive airflow and robust construction required for high-performance competition.
No matter which path you choose, upgrading to Trick Flow® cylinder heads is one of the most effective ways to wake up your Small Block Chevy.
Thank you for reading!
Your friend,
Todd
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