Product code KK3670 for Subaru WRX STI EJ25 (2.5L) Pr. 2004-2006
KK3670
Subaru WRX STI EJ25 (2.5L) Pr. 2004-2006
Key Features:
Subaru WRX STI EJ25 (2.5L) Pr. 2004-2006
- All new OE Castings
- Enlarged intake and exhaust ports
- Large diameter stainless steel intake valves
- Large diameter inconel exhaust valves
- Hi-rev, dual valve springs
- Titanium retainers
- Hardened steel spring platforms
- Reshaped combustion chamber on most applications
- Flow bench proven design
- Dynamometer tested
- Machined Cosworth logo
- Precision multi-angle valve job
- Pre-assembled, ready to install
- Machined port bore finish
- Knife edge port divider
