RB N54/N55 5/16" Thick Head Flange with Inserts 320i (F31) Instantly Improve Transmission Performance and

Instantly Improve Transmission Performance and Cooling

the intake system delivers a louder and sportier induction tone that perfectly complements tuned and hybrid turbo applications

we offer a catless version which incorporates a 4" Resonator in place of the catalyst

Installation is very discrete

0L BMW E92 335xi N55 3

RB N54/N55 5/16" Thick Head Flange with Inserts 320i (F31) Instantly Improve Transmission Performance andThese flanges are designed with true tapered inlets and backside stress channels (as they were from the OEM's). They are a 7 piece design (single main 5 16" thick flange, six exhaust runner inserts with locators for 1 1 4 Schedule 10 Weld Els). Unlike competitive products priced comparably and made from cheap material, these are billet machined from 100% 304 304L material (with certs). The proclaimed flange of choice for many educated N54 N55 turbo