SLE Audi A4 & A5 B9 (2.0T TFSI) 2015–2019 Catless Downpipe F90 Stage 1 TrueFlex (full E85)

Stage 1 TrueFlex (full E85)

Power increases vary with model

or GLS53 — this downpipe replaces the restrictive factory catalytic converter for dramatically improved exhaust flow

Our TrueFlex flex fuel conversion kit upgrades the factory engine computer to read and instantly adapt to any Ethanol blend

SLE Audi A4 & A5 B9 (2.0T TFSI) 2015–2019 Catless Downpipe F90 Stage 1 TrueFlex (full E85)The SLE Catless Downpipe is built to improve exhaust flow and performance for the B9 Audi A4 and A5 equipped with the 2. 0T TFSI engine. By removing the factory catalytic converter, this upgrade reduces backpressure, improves turbo response, and delivers a more aggressive exhaust tone perfect for street or track use. Crafted from T304 stainless steel, and TIG welded with back purged construction, its made to withstand the demands of high boost