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OneFastShop S55 3 inch catless downpipes for the BMW F80 M3, F82 M4 and F87 M2 Competition
Latest Exhaust
Apr 1, 2026 11 min read

S55 Catless Downpipes: Power, Sound, and Fitment for the M3, M4 & M2

OneFastShop's 3 inch S55 catless downpipes for the F80 M3, F82 M4 and M2 Competition: 25 to 40 hp with a supporting tune, fitment by year, the full...

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Alpine White BMW F80 M3 with the S55 engine, front three quarter view at sunset
Cooling
Feb 11, 2026 13 min read

S55 Cooling Upgrades: How to Stop Heat Soak

Why the S55 heat soaks on the F80 M3, F82 M4 and M2 Competition, which charge cooler, heat exchanger, oil and DCT cooler to buy first for street or track, maker test...