Manley Intake Valves for 02-05 WRX / 04+ STi (Set of 8) Select Valves::(11138-8) 36mm/Standard The Circuit II QRT is

The Circuit II QRT is FIA approved

double check your motor specs and please confirm before purchase

Supertech dual valve spring kits for R35 GTR

16560 M3 F80 (2015-2018) M4 F82/F83 (2015-2020)

This will require some custom work including a 4 inch intake pipe and a hose connection compressor outlet adapter

Manley Intake Valves for 02-05 WRX / 04+ STi (Set of 8) Select Valves::(11138-8) 36mm/Standard The Circuit II QRT isManley Race Flo intake valves are available in different sizes and listed by head diameter. Intake valves are sold as a set of 8. Fits 2002 2005 EJ205 Subaru WRX and 2004 2021 EJ257 Subaru STi. These valves are not compatible with the 2006+ WRX. Vehicle Fitment: EJ205 EJ257 2002 2005 Subaru WRX 2004 2021 Subaru STi (* Not for 2006+ WRX models *) Purchase Includes: Set of 8 Valves Select Head Diameter Valve Size Manley Race Flo Valves: Manley Race