ApexBuilt® BMW F97 X3M & F98 X4M Resonated Mini-Cat Downpipes (S58, 2020+)

From £1,718.00
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NO TUNE REQUIRED!

Our unique O2 sensor housing design allows for a direct bolt-on installation, without resulting in a check engine light – even on otherwise fully stock cars. 

ApexBuilt® BMW F97 X3M & F98 X4M Resonated Mini-Cat Downpipes offer...

• Perfect fitment, guaranteed. 

• No check engine light, no error codes. No need to unlock your DME, no tune required. 

• Drastically improved throttle response, quicker turbo spool, and an aggressive exhaust note.

• Estimated gains of 20-25+ wheel horsepower and 40-50+ TQ when installed on a vehicle that is not tuned.

• Estimated gains of 60+ HP and 100+ TQ over stock power levels when paired with an aftermarket ECU tune.

• T304 stainless steel construction 

• Lifetime warranty 

 

PLEASE NOTE:

These these parts are for OFF ROAD / RACE USE ONLY . They are not 50 state legal. Any of our catless race downpipes WILL NOT be sold in, or shipped to, the state of California. We advise you to run a tune on your vehicle for best results.

 

 

 

• 18328053345 (Cyl. 1-3)
• 18328053346 (Cyl 4-6)

Fitment supported for the following vehicles:

BMW X3 M F97 (2019+)
BMW X4 M F98 (2019+)