BMW 1 Series M135i F20/F21 Exhaust Tips 3.5" (88.9mm) - M Performance Style Tailpipe Trims | Cobra Sport Stainless or Black | Slip-On OE Look Pair | Direct Fit to Locator Pins | Replaces 18307610633 | Backbox/Muffler Tip Covers | N55
Transform the rear of your BMW 1 Series M135i with premium tailpipe finishers that look factory fresh and feel truly special. Manufactured by Cobra Sport in high quality stainless steel and available in a stealth black ceramic coated option, this set of two straight-cut end pieces delivers a bold, upmarket appearance with simple, tool-free style installation.
Engineered specifically for F20 and F21 M135i models with the 3.0 N55 engine, these OE-look end trims slip straight onto the original locator pins for a clean, secure fit. No cutting. No welding. No coding. Just a fast, satisfying upgrade that instantly refines the back end of your hot hatch.
Why choose this upgrade
Bigger presence: upsized 88.9 mm diameter tails for a stronger, sportier look at the rear.
15 percent increase in overall diameter versus stock for a more aggressive stance.
0.5 inch larger than the original outlets to fill the bumper cut-outs properly.
Premium materials help combat corrosion and staining often seen on factory finishers.
Straight-cut, M-style aesthetic that complements the M135i’s performance character.
Fitment and compatibility
Designed for BMW 1 Series M135i F20 and F21 with the 3.0 N55 engine.
Direct fit to OE locator pins. No modifications required.
Supplied as a pair to replace both sides.
Direct swap for BMW part reference: 18307610633.
Finish options
Polished stainless steel for a bright, motorsport-inspired shine.
Black ceramic coated for a subtle, stealth performance look.
Our experience
We have fitted these tips on multiple customer cars and our own vehicles. Feedback has been consistently positive for the fit, finish and the instant visual upgrade. It is a simple change that makes a big difference to the overall appearance.
Installation support
Prefer professional fitting? Book in with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a quote and availability.
What you receive
2 x Cobra Sport OE-style tailpipe finishers in your selected finish
One year warranty
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