SPEED LOGIC BMW N54 Engine 3" Stainless Steel Cast Catless Race Downpipes (2007-2013 BMW 135i, 1M, 335i, 335is) E82/E88/E90/E91/E92/E93

  • Sale
  • $249.00
  • Regular price $399.00

*FREE SHIPPING for ALL Speed Logic Products on orders over $100 for a Limited Time!*

Speed Logic is proud to present the N54 Downpipes for the BMW 135i and 335i vehicles. Downpipes are a proven modification for the N54 engine which can extract large power gains - over 30whp / 40 rwtq can be gain with these Downpipes. These Downpipes feature a full 3" Cast one piece design for the VBand connection to the Turbos which promote a smooth flow with minimal turbulence. They provide an amazing sound increase and engine tone change due to the better flow they allow. Speed Logic exhaust components are made from Stainless Steel 304 grade high grade materials which will last a lifetime. We include all Hardware required to complete the installation - including high quality Downpipe Gaskets and Bolts, Washers, Nuts which are Grade 10 rated. All Speed Logic products come with a LIFETIME WARRANTY against manufacturer defects, fitment issues, etc.

Note: Replaces OEM BMW Downpipe part # 18307587609 & # 18307587610


  • Features Cast Design with Full 3" diameter for smoother flow on Downpipe Entry point from Turbo up to 2.5" Connection to Midpipes/Catback Exhaust
  • Adds 30+ Horsepower (HP) and 40+ Torque (TQ) with adequate Tuning
  • Removes restrictions within Factory exhaust system
  • Provides Intoxicating Turbo sounds and deeper Exhaust note
  • Works with All Stock Location Turbos including
    • OEM Stock Turbos
    • Pure Turbos (Pure600, Daily Driver, High Flow)
    • Vargas Turbos (Stage 1, Stage 2, Stage 2+, etc)
    • RB Turbos (Stage 1, Stage 2, Stage 2+, GFs)
  • Full Stainless Steel 304 Materials
  • 100% TIG welded
  • All welds fully Backpurged with 100% Argon
  • No welds are grinded or polished - we take pride in our welds!
  • Box Contents: (2) Downpipes, Gasket Set and Downpipe Hardware included for seamless Installation
  • Includes Speed Logic LIFETIME warranty against defects, fitment issues, etc



  • (2) Speed Logic Downpipes - One for Front Turbo, One for Rear Turbo
  • (2) Downpipe Gaskets
  • (4) Bolts, Washers, Lock Washers & Nuts for Midpipe Connection



  • 2008 - 2010 BMW 135i & 1M w/ N54 Engine (E82,E88 Chassis)
  • 2007 – 2013 BMW 335i & 335is w/ N54 Engine (E90,E91,E92,E93 Chassis)
  • This product fits both Left Hand Drive (LHD) and Right Hand Drive (RHD) Vehicles without modifications


TUNING: We recommend using one of the following Tuning suites as adequate tuning options to accompany this product:

  • MHD Flasher for N54 Engines
  • JB4 Piggyback Tuner for N54 Engines
  • Motiv Reflex / Reflex Plus for N54 Engines

*NOTE: Speed Logic Downpipes are for OFFROAD USE ONLY and not available for sale in California and other states with emissions testing.