V-Band Clamp Size:2.5" The Power Driven K-Series 4-2-1

The Power Driven K-Series 4-2-1 header for 04-08 TSX and 03-07 Euro Accord CL7 CL9 features a true step-up exhaust header which is designed and engineered for maximum flow and horsepower

Thicker flange than standard thermostat for added strength and longer life

* It flows 400LPH (100 gph) at 40 PSI

The Honda/Acura K20A

whatever changes you make to the base fueling will likely be in the wrong location

V-Band Clamp Size:2.5" The Power Driven K-Series 4-2-1Unlike traditional flanges that need gaskets, bolts and nuts, these v band clamps are a quick and easy way to connect your exhaust piping. Key Features: Connect your exhaust setup without gaskets or other hardware Available in 2. 5", 3", 3. 5", 4" Each set includes two V band flanges and one clamp