aFe Power Twisted Steel Header for 2006 BMW 325i(48-36307-1) 1523 The housing is designed to

The housing is designed to retain the same water fording height as the factory intake system while providing more air flow and better protection

Coupes and spiders

PN 140828 and the more aggressive S-Type sound level

Progressive 5 Layer Cotton Gauze Material

Dyno Proven gains of up to 16 hp and 11 lb-ft

aFe Power Twisted Steel Header for 2006 BMW 325i(48-36307-1) 1523 The housing is designed toTwisted Steel Header 304 Stainless Steel w Cat. aFe POWER Twisted Steel Long Tube Headers are constructed of near equal length 1 1 2 IN 16 gauge 304 stainless steel tubing with thick flanges to ensure a leak free seal. To eliminate dead space that can cause turbulence and hinder flow that formed collectors are prone to produce, true merge collectors and optimized tube lengths are used for true pulse control technology improving flow and performance.