- Designed to work with the new KSTech Cold AirBox.
- For high-HP modified '02-'07 Subaru WRX and STI that need a larger MAF housing.
- 73mm MAF diameter is good for up to about 400-450 awhp.
- Fits directly onto the turbo inlet (stock, silicone, APS, or AP). No MAF Elbow required.
- The most direct, high-flowing short ram available.
- Straight shot - no bends.
- Machined velocity stack.
- Reusable ultra-high-flow K&N filter mounted on aluminum velocity stack.
- Works with most FMIC setups (but not the Perrin), but works best with the KSTech Cold AirBox.
- Designed, Tested, and Manufactured in the USA
- Absolutely positively requires engine management and tuning!