The Chimera CNC Head Program for the Subaru WRX and STi were developed to stronghold the market by offering the enthusiast the ultimate flexibility with his/her build. This comes true as used customer supplied heads can be sent in for CNC service, not just new cores. so stop making excuses for not taking your heads to the next level and step up to the competition.
Packages available for:
- 2002-2005 2.0L WRX Head (EJ205)
- 2004-2006 2.5L STi Head (EJ257)
- JDM Version 7 Big Port Heads (EJ207)
Flow Charts are available for download at the bottom of this page.
Program Options:
Chamber Relief: With this option, the combustion chamber will be CNC machined to match the relief of the actual cylinder bore. This will reduce detonation causes by the shelf created from putting a small combustion chamber on a larger bored block. The ever popular Hybrid setup is a perfect example as it uses 2.0L heads and a 2.5L block.
Customer Supplied Heads: This option allows the customer to supply a problem free set of heads for the CNC machining. If heads are not being supplied, brand new OEM Subaru head cases will be used for an additional cost.
Package 1
- CNC Intake Ports
- CNC Exhaust Ports
- Valve Job
- Camshaft Clearance Machining
- Deck Machining (All Surfaces)
- Hot Tank Cleaning
Package 2
- Includes Package 1
- Full Assembly including Valve Lashing
Package 3
- Includes Package 2
- Chamber Relief
Return Shipping back to the customer is included in the purchase price. Shipping of the heads to Chimera Performance is at the customers expense.
Disclaimers: Please Read
* In the event the valve guides or seats are damaged or excessively worn, they must be replaced prior to the CNC procedure. Customer will be notified and replacement will be at the customers expense.
Download the flow charts here.
