• No check engine light on factory-tuned vehicles.
• 49 state emissions legal*
• Industry-leading build quality.
• Perfect fitment, guaranteed.
• Drastically improved throttle response, quicker turbo spool, and an aggressive exhaust note versus OEM.
• Estimated gains of 20-25+ wheel horsepower and 40-50+ TQ when installed on a vehicle that is not tuned.
• Estimated gains of 45+ HP and 60+ TQ over stock power levels when paired with an aftermarket ECU tune.
• TIG-welded T304 stainless steel construction, assembled by hand in Naples FL.
• EPA approvedGESI GEN2 UHO metal-core 400cpsi 4.5" cats, rated for 500-800hp applications & road legal in 49 states.
• Lifetime warranty.
These downpipes will not be sold or shipped to the state of California. GESI 400cpsi cats are EPA approved, but not CARB approved – meaning they're street legal in all 49 states EXCEPT the state of California.
I have it paired with R44 Titanium cat back and I love the sound they make together. I definitely feel it in the base of my seat now. A lot more pops and burbles and a stronger deeper rumble.
Also I felt a nice power increase especially low end. Seems to have eliminated any hint of lag. Love it.
These were easy to install and they keep you from getting a cell. Build quality is unreal and the sound makes the M sound exotic!
Very high quality product here. My installer (who's installed every downpipe there is on this platform) commented on how well it was built. Fitment is good and the sound and performance is awesome!
I’ve had this downpipe on my car now for a few weeks and I absolutely love it.
I have it paired with a full AA Catback w/non-res X midpipe and the sound the car makes now is just pure insane and gives me a stupid grin anytime I drive my car.
Quality is top notch, welds are very good and well done. Fitment is perfect.
The high flow GESIRead more about review stating High quality, amazing sound addition! cats are obviously the best out there.
About 500 miles and no CEL just like these GESI cats guarantee.
10/10, fully recommend!!
Nice power bump, sounds great, not raspy
Would recommend these to anybody with a G80 or G82. Fitment is on point, woke the car up a lot vs stock downpipes. Sound is the perfect volume, aggressive and not raspy with the downpipes + m performance exhaust, very happy with my purchase
A+ fitment, no check engine light, amazing!
Very happy I went with apexbuilt for downpipes on my 2021 BMW M3. Their downpipes are priced fairly, ship quickly, and most importantly the fitment is 100% accurate. The best part, my M3 isn't tuned and has no check engine light after 4000 miles with apexbuilt downpipes! The sound is amazing as well, aggressive and deep without being too loud. I would recommend them to anyone, thanks again for the help!