These stainless steel made Alpha Competition decat downpipes, in 3.15" / 80mm diameter, fit without modification between the turbos and the front pipes of the S58 engines fitted to the BMW X3M / X4M F9x in order to remove the main catalysts. Manufactured from high quality T304 stainless steel with handmade TIG welds, these downpipes will bring an average gain of 35hp on a stage 1 engine and a particularly aggressive sound. With a high flow structure and thermal insulation (Optional) to reduce heat radiation by 50%, these downpipes clearly represent the best value for money on the market!
- Select your version -
Direct mounting
2-piece kit
100% T304 stainless steel
3.15" / 80mm pipes
Measured gain on stage 1: 35hp
Aggressive sound
Handmade TIG welds
Assembly kit included
Optional specific thermal insulation
Lifetime warranty
- ECU calibration is mandatory -
| Brand | Model | Type | Version |
|---|---|---|---|
| BMW | X3 / X4 | F9x - 19-... | M - 480 / 510 |
No Instructions
Difficulty Level:
| Brand | Model | Type | Version |
|---|---|---|---|
| BMW | X3 / X4 | F9x - 19-... | M - 480 / 510 |
No Instructions
Difficulty Level:
Alpha Competition products are inspected and certified as compliant before shipping. This certification is complementary to the manufacturer's warranty covering manufacturing or material defects for one year on most products in the range. Intercoolers and exhausts have a non-transferable lifetime warranty, but do not cover aesthetic defects that may appear over time. The replacement or repair of the products will depend on the decision of the manufacturer, who will be entitled to request proof or return for expertise of the items concerned. Return costs and third-party costs are not covered by the Alpha Competition warranty.
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Reviews (2)
VERY GOOD PRODUCT, ASSEMBLY QUALITY AND FINISH ARE BOTH STUNNING. QUICK DELIVERY TO MONACO AND GOOD SERVICE. BE CARREFULL, CAR WILL BE VERY LOUD .
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Montage impeccable, se place comme à l’origine. Soudures propres. J'ai fait une carto avec, et dès le premier essai, le gain de puissance se ressent et la sonorité est nettement plus sportive sans être insupportable. Très bon rapport qualité prix !!