If your N55 is being held back anywhere, it is the factory downpipe. Ours opens it up: a 76mm bore and a free-flowing 200 CPSI racing main cat let the exhaust clear faster, dropping back pressure so the engine makes more power and, just as noticeably, more torque. The cat keeps a Euro 6 coating, so the gains come without throwing emissions out the window.
What it is made of, and how it fits
The body is cast SS304 (1.4301) stainless steel, chosen for how long it lasts and how well it shrugs off corrosion under constant heat. The whole part was drawn up in CAD around the OEM geometry, so it goes straight onto the factory mounting points as a 100% direct swap, nothing to trim, bend or adapt. Two lambda sensor bosses are built in, leaving room for whatever sensor layout your tune calls for.
What it does for the car
Two things, really. The obvious one is performance: more flow, less restriction, a stronger pull through the range. The quieter one is longevity: by letting heat escape more freely, it eases the thermal load on the turbocharger, which tends to live a longer life for it.
Vehicles
- BMW 135i E82 / E88 (N55)
- BMW 335i / 335xi E90 / E91 / E92 / E93 (N55)
Part no: 500001005
Available on request.
Estimated EU delivery: 7–14 business days.
