BMW M135i 3 & 5 Door (F20 & F21) Cat Back Exhaust (Resonated) Auto Specialists External Tube size = 50mm

External Tube size                = 50mm x 8mm

Hoses available in black

The higher the final drive ratio the faster the acceleration through the gears to the terminal speed

Lowering Front: 35 mm

and we highly recommend them in both the racing and forced induction arena

BMW M135i 3 & 5 Door (F20 & F21) Cat Back Exhaust (Resonated) Auto Specialists External Tube size = 50mmPart number: BM75 BMW M135i Performance Exhaust Tailpipes: 3. 5" (88. 9mm) inward rolled baffled (TP161) Cobra Sport performance exhausts enhance the sound, looks and quality of your vehicle giving you the ultimate driving experience. Our sports exhausts range is fully guaranteed to give you assurance of our quality. This BMW M135i performance exhaust is made in 3" 76. 2mm pipework and fit from the catalytic converter section backwards (Cat back)