NEW ///Turner N54 3" High-Flow Catted Downpipes

[TurnerMotorsport]

Turner Motorsport 3" High-Flow Catted Downpipes - E9x 335i, 335is, E82/88 135i, 1M (N54)

Factory downpipes and their restrictive catalytic converters are a choke point for exhaust gases.
This restriction slows turbocharger spool, reduces efficiency, and significantly impacts power output.



When modifying an N54, most enthusiasts quickly find OEM downpipes are woefully insufficient as power levels are increased, which ends in disappointing results from other modifications.
While some find catless downpipes to be the answer, their benefits fail to outweigh the downsides when used on the street.
A catless downpipe can make the exhaust volume louder than one would enjoy for daily street driving, generally causes pesky check engine lights, and can fail emissions testing.




Turner engineers designed downpipes that met a happy compromise - excellent flow and high performance with 48-state legal catalytic converters.
By utilizing cats, these downpipes offer much lower emissions than catless products with little sacrifice to performance versus their catless counterparts. These high-flow units feature a 3" inlet, followed by a series of smooth radius bends and efficient converter, where it exits as a 2.5” flange to retain compatibility with popular cat-back exhausts or factory exhaust.



Turner N54 E82/E88 135i Upgraded Performance Downpipes

Turner N54 E9X 335i/335is Performance Upgrade Downpipes

[TurnerMotorsport]

Make all the power without the terrible smell!