BMW Exhaust Parts, Mufflers & Catalytic Converters for BMW 5 Series E39 (1996-2003)

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Performance exhaust options from the best BMW aftermarket producers and the most reliable replacement maintenance parts are all at Turner Motorsport. Over time, factory exhaust on the cleanest examples of BMW heritage shows their age. Our factory replacement exhausts are just what you need to keep your favorite car in showroom condition or finish off your restoration. If you are looking for a bump in sound and power, you can also find our performance options like Headers, Downpipes, and Mufflers from Corsa, DINAN, and others on this page.

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Universal Catalytic Converter - 2.25"
Universal Catalytic Converter - 2.25"
Emico - Corporate Logo
T#:23152011
Part#: 602205
Ships in 3 Business Days
$ 97.99 USD
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$ 97.99 USD
Free Shipping on orders $49 and up
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Enhance your BMW's performance with this OBD II compliant universal fit catalytic converter. This converter, devoid of O2 sensor bungs, ensures compatibility with various vehicles. However, please note that it's not a 50-state legal catalytic converter. For California residents, it's recommended to verify local laws pertaining to aftermarket catalytic converters.
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Rogue Engineering Diablo Exhaust E39 M5
Rogue Engineering Diablo Exhaust E39 M5
Rogue Engineering - Corporate Logo
T#:22163397
Part#: REE39M5XD
Back Ordered
$ 1,295.00 USD
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$ 1,295.00 USD
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Few sounds can summon goosebumps quite like the S62 V8 found in the E39 M5 with a well designed exhaust system. Rogue Engineering is proud to introduce the E39 M5 Diablo Exhaust. The heavy factory resonator (21 lbs. by itself) primary job is to muffle sound and eliminate exhaust "drone". It does such a great job, much of the exhaust sound is killed by this resonator by itself. The factory mufflers do a fantastic job of completely muffling sound in the E39 M5. So well that the only way you can really hear the vehicle is to completely roll down all the windows to really hear the V8 exhaust sound. Between the factory resonator and the two rear mufflers, these components weigh a staggering 98 lbs. All Rogue Engineering Diablo exhausts are produced using only 100% full T-304 stainless steel because of its consistent strength characteristics, corrosion resistance, and wide range of materials (important for controlling sound and exhaust flow). Features: New, lighter muffler body reduces weight to only 19.4 lbs. per side. 100% T-304 stainless steel construction and internals, a majority of the exhaust made from 16 gauge stainless steel. Exclusive, oversize 3" OD inlet tubing (stock and most other aftermarket companies have 2.5" OD) for maximum exhaust flow. Fully mandrel bent tubing, no crimps or flattened areas. Mil-finished pipes and muffler, mirror polished, Rogue Engineering Club Sport double walled, stainless steel quad 80mm, staggered tips. Completely fills in factory valence without modifications. Full TIG welded construction, no lock seams or pinch welds. Factory-like hangers for OEM fit Rogue Engineering logo tastefully stamped in the body of the muffler Flow-through design does not create muffler "hot spots" found on chambered mufflers Optimized tubing sizes and minimized bends maintain exhaust velocity without compromising necessary backpressure Deep, throaty tone, without the drone.
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BMW Xforce Smartbox Varex Muffler ECU Upgrade Module
BMW Xforce Smartbox Varex Muffler ECU Upgrade Module
XForce - Corporate Logo
T#:28570834
Part#: VKSB01-ECU-MODUL
Ships in 1 Business Day
Sale - Save 10% $ 399.00

This product was last offered at the strikethrough price on
08-29-2026

$ 359.10 USD
Free Shipping on orders $49 and up
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Sale - Save 10%
$ 399.00

This product was last offered at the strikethrough price on
08-29-2026

$ 359.10 USD
Free Shipping on orders $49 and up
Add to Wish List
BMW Xforce Smartbox Varex Muffler ECU Upgrade Module is the ideal choice for BMW owners seeking to enhance their vehicle's performance. This innovative module seamlessly integrates with the Varex muffler system, allowing for precise control over exhaust sound and performance. With its easy installation process and versatile functionality, it provides an elevated driving experience for BMW enthusiasts.
  • Seamless integration with Varex muffler system
  • Precise control over exhaust sound and performance
  • Easy installation process
  • Versatile functionality for enhanced driving experience
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