Performance M
Garage Whifbitz Titanium Cat-Back/Catback Exhaust 3.5 inch Single Midpipe, Valved – BMW M3 M4 F80 F82 F83 (F8X) S55 Performance Lightweight Exhaust System
Garage Whifbitz Titanium Cat-Back/Catback Exhaust 3.5 inch Single Midpipe, Valved – BMW M3 M4 F80 F82 F83 (F8X) S55 Performance Lightweight Exhaust System
Heads-up on cancellations & returns: if you cancel an order or return an item, you won't get back 100% of what you paid. We apply a 10% restocking fee, the outbound shipping is non-refundable, and we have to pass on Shopify / PayPal payment processing fees; these aren't returned to us when we refund you. International orders also lose on exchange-rate spread in both directions. If the original packaging is damaged or missing, a reboxing charge applies. For international orders specifically, if you refuse to pay our shipping invoice or supply a prepaid label after placing the order, the same deductions apply. We're upfront about this — please be sure of your purchase before ordering.
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Transform the sound and response of your BMW M3 and M4 F8X with a lightweight titanium cat back
Unlock sharper throttle response, a richer soundtrack and real-world performance gains with this premium titanium system designed for the BMW F8X platform. Suitable for F80 M3 saloon and F82 F83 M4 coupe and convertible, this valved setup delivers everyday civility with an aggressive tone on demand.
Why enthusiasts choose this upgrade
- Proven power increase of around 12 bhp on a stock car, measured at the wheels on a dyno
- Super light construction at only 15 kg from the downpipe connection rearwards, helping reduce mass
- Retains factory valve control so you get quiet refinement in Efficient mode and a more vocal note in Sport and Sport Plus
- Designed to tame the characteristic S55 rasp for a cleaner, deeper sound
- Built around a single 3.5 inch centre section for excellent flow
- Ovalised mid section for maximum ground clearance on lowered cars
Thoughtful engineering for the F8X S55
The layout uses dual 3 inch pipework at the downpipe join, merges into a free flowing 3.5 inch single mid section, then divides to twin outlets into a large rear silencer. The result is strong mid range torque, improved top end breathing and refined acoustics without unwanted harshness.
Specification and options
- Material: lightweight titanium throughout the system
- Configuration: twin 3 inch to single 3.5 inch mid, then twin rear into a large silencer
- Valve compatibility: keeps both OE exhaust valves and integrates with factory drive modes
- Availability: also offered in stainless steel if preferred
- Modularity: downpipes and mid sections can be purchased separately to pair with the original rear silencer
Real feedback from our workshop
We have fitted this system for customers and on our own cars. Owners love the weight saving feel, the improved response and the way it calms S55 rasp while delivering a purposeful tone when you want it. It looks and sounds the part without making the car tiring on longer drives.
Fitting and support
Professional installation available at MJ Modifications in Warwickshire. For a fitting quote or expert advice, email info@mjmodifications.co.uk.
Search-friendly terms to help you find the right upgrade
BMW M3 F80 exhaust upgrade, BMW M4 F82 F83 cat back, F8X S55 valved titanium system, 3.5 inch mid pipe, single midpipe conversion, performance rear silencer, lightweight titanium catback, UK performance exhaust, BMW M3 M4 exhaust system.
Note: Power figures and sound levels can vary depending on vehicle condition and supporting hardware.
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