GrimmSpeed HiFlow Exhaust Manifold Crosspipe Subaru WRX 06-07 / Forester XT 04-08 | 002001 Vehicle Model_GT-R Some customers choose to regap

Some customers choose to regap these plugs to correct misfiring or tune for optimal spark -- do so at your own risk -- slide-type plug gapper will damage the fragile iridium tip

X-Line Overall Size: 28

Cross-member Supplement Washers

This product cross-references with Subaru part number 44022AA160

NOTE: Stock stroke is 88mm

GrimmSpeed HiFlow Exhaust Manifold Crosspipe Subaru WRX 06-07 / Forester XT 04-08 | 002001 Vehicle Model_GT-R Some customers choose to regapFitment Information: 2006 2007 Subaru WRX 2004 2008 Subaru Forester XT Features: The GrimmSpeed HiFlow Exhaust Manifold Crosspipe was developed specifically for the Subaru WRX 06 07 and Forester XT 04 08 to optimize exhaust gas flow. 50% of the exhaust gases pass through the narrow OEM pipe, which can create challenges in performance if not addressed properly. To ensure reliability, GrimmSpeed uses high grade components in their product fabrication,