GrimmSpeed 3in Downpipe to Stock Cat Back Adapter Subaru WRX 02-21 / STI 04-21 | 077044 Vehicle Model_Mazdaspeed Mazda3 5 litre engines

5 litre engines

5043 Beehive Rev and Boost range (using an S3 profile camshaft set)

Intake 282 / 240 @

which gives them about 1000% (that's ten times) better fatigue strength than those studs that are threaded prior to heat-treat

Fully programmable

GrimmSpeed 3in Downpipe to Stock Cat Back Adapter Subaru WRX 02-21 / STI 04-21 | 077044 Vehicle Model_Mazdaspeed Mazda3 5 litre enginesFitment Information: 2002 2021 Subaru WRX 2004 2021 Subaru STI 2005 2009 Subaru Legacy GT 2005 2009 Subaru Outback XT 2004 2013 Subaru Forester XT Features: Kill that exhaust leak for GOOD! This GrimmSpeed adapter will allow you to adapt and properly seal an aftermarket 3 inch downpipe to a 2. 5 inch OEM or OEM like catback exhaust. This adapter only works with a flared end and it creates a smooth transition from your 3" inch aftermarket downpipe to