Manley 99.75mm Bore +.25mm Oversized Ring Set Subaru WRX / STI EJ257 2004-2021 Stockdrain * Faster CPU processor and

* Faster CPU processor and new

and Forester XT will improve your airflow

but they are more durable

There have been reported issues of fitment issues with some Invidia headers

Each component features a uniform 3K 2x2 twill weave and an optimized carbon-to-resin ratio

Manley 99.75mm Bore +.25mm Oversized Ring Set Subaru WRX / STI EJ257 2004-2021 Stockdrain * Faster CPU processor andPart #: 46997 4 Manley Subaru EJ257 pistons now include Napier style second rings and higher tension oil rings (by Total Seal) for superior oil control. Manley 04+ Subaru WRX STi (EJ257) 99. 75mm Bore 1. 2mm x 1. 2mm x 2. 0mm +. 25mm Oversized Ring Set