K&N Drop-In Filter Subaru WRX / STI 2002-2007 | 33-2232 vendor_Walbro ACT's Streetlite flywheel 600235 is

ACT's Streetlite flywheel 600235 is considerably lighter than stock and is made from durable Chromoly Steel

Reduces Body Roll and Improves Handling

Part: # MMTS-WRX-01

But then say you get detonation with 18psi when you are at 7000rpm unless you are below 16psi

Part #: GCA761-2

K&N Drop-In Filter Subaru WRX / STI 2002-2007 | 33-2232 vendor_Walbro ACT's Streetlite flywheel 600235 isPart #: 33 2232 K&N's WRX & STI replacement air filters are designed to increase horsepower and acceleration while providing excellent filtration. K&N filters are custom designed to fit into your existing factory air box for simple, fast installation. K&N stock replacement air filters for street vehicles are covered by a Million Mile Limited Warranty. K&N Filters use oil to provide filtration, and can be washed and recharged using the K&N cleaning kit