Crawford CCR 660 Club Racer Subaru Cylinder Heads | EJ WRX STI

Crawford CCR 660 Club Racer Subaru Cylinder Heads | EJ WRX STI

Crawford Club Racer CCR 660 – Cylinder Head Service (Pair)

Built for club racing. Behaves on the street.

The Crawford Club Racer CCR 660 cylinder head service delivers CNC-ported EJ heads for Subaru WRX/STI builds targeting ~520–550 whp (roughly ~660 bhp at the crank) with the right turbo, fuel, studs, and tune. Expect stable high-lift airflow, clean sealing, and repeatable results—prepped the same way we build heads for our motorsport programs.

Quick Specs

• Platform: Subaru EJ (WRX/STI)
• Output target: ~520–550 whp potential (supporting mods required)
• CNC porting + hand blend
• MLS-ready deck finish
• Lash set to your cam card
• Pressure-tested before shipment

Who It’s For

• EJ-platform WRX/STI builds that have outgrown stock ports and factory seat geometry
• Track days, time attack, drag, and serious street cars that demand reliability
• Builders who want documented, repeatable clearances and seat/guide work
  

What You Get (Pair of Heads)

• CNC porting + hand blend (intake/exhaust) for stable high-lift flow and consistency
• Competition multi-angle/radius valve job matched to your cam profile and intended RPM range
• R&R 16 bronze valve guides with new Viton valve seals
• OHC bucket lash set to your cam card (Kelford / GSC / OE)
• Precision resurfacing to an MLS-grade finish for reliable sealing
• Pressure test, final clean, and assembly with heat tabs
• Build sheet with recorded clearances (optional flow sheet add-on)

Popular Options (Select at Checkout)

• Valves: Stainless intake / Inconel exhaust (Manley or Ferrea)
• Springs/Retainers: Dual spring kit + titanium retainers
• Combustion chamber match: gasket bore match (99.5–102 mm) + chamber deshroud
• AVCS: single- or dual-AVCS configuration based on casting/VIN and your setup
• Cams: supply your cams or select recommended profiles
  

Compatibility & Fitment

• Platforms: EJ205 / EJ255 / EJ257 / EJ207 (specify by VIN/casting)
• AVCS: we configure to your application—select single/dual AVCS at checkout
• Intended use: off-road/competition; professional calibration required

Recommended Supporting Mods

• ARP 625+ head studs + MLS head gaskets (thickness chosen to set quench)
• Fuel system sized to the goal; quality AOS; proper oiling and ventilation
• Turbo sized for 520–550 whp, adequate intercooling, and real heat management
• Professional tune; verify boost control, knock strategy, and coolant/oil temps

Process & Standards

• Race-proven machining and assembly with tight, repeatable tolerances
• Seat/guide geometry set for your cam lift and intended RPM range
• Deck finish verified to MLS spec; pressure-tested before shipment

Core, Castings & Lead Time

• Service price covers machine work and assembly. Does not include castings unless selected.
• Send your heads or add new OEM castings from the dropdown.
• Small-batch production; lead times vary. When sold out, next-batch ETA applies.

Install & Tuning Notes

• Verify short-block deck surfaces are clean, flat, and within spec. Mock up with MLS gaskets and ARP 625+ studs.
• Confirm final bucket lash during assembly; follow torque/angle specs and sealant procedures.
• Use proper break-in oil, then change oil + filter; monitor oil/coolant temps and knock activity.

In the Box

• Assembled CCR 660 cylinder heads (pair)
• Build sheet with recorded clearances (flow sheet if selected)

Legal

Competition/off-road use only where applicable. Not CARB-approved. Professional installation and calibration required. Power estimates vary with turbo, fuel, altitude, dyno type, and tuning.

Bundle & Save: Pair CCR 660 with Crawford Short Blocks, ARP studs, MLS gaskets, and a Crawford AOS for a complete top-end package.

Optimized Performance

The Crawford CCR 660 Club Racer Heads for EJ WRX/STI are designed for enthusiasts who demand maximum performance from their vehicles. These cylinder heads provide superior airflow, which is essential for boosting engine efficiency. With improved intake and exhaust flow dynamics, you can experience a noticeable increase in horsepower and torque. This means your car will not only run smoother, but it will also deliver the power you crave on the track and the streets.

Durable Build Quality

Durability is key when it comes to high-performance parts, and the Crawford CCR 660 Club Racer Heads do not disappoint. Crafted from high-quality materials, these heads are built to withstand the heat and stress of intense driving conditions. Because of their robust construction, you can rely on these heads for long-term performance, ensuring you get the most out of your investment. This durability translates to less frequent replacements, allowing you to drive with confidence.

Easy Installation and Compatibility

Installing the Crawford CCR 660 Club Racer Heads is relatively straightforward, making it a favorite among DIY enthusiasts and professional tuners alike. They are designed to be compatible with the EJ WRX and STI engines, so you won’t need any additional modifications to your vehicle. Therefore, whether you are upgrading an old model or enhancing a new one, you can enjoy the benefits of these heads without unnecessary hassle. Experience the transformation of your vehicle quickly and effectively.