*PRE-ORDER PLEASE READ* B46 True 4-Inch Catless Downpipe
UPDATE: AS OF 5/9/2025 THE NEXT BATCH HAS FINISHED PRODUCTION AND ARE BEING PREPARED FOR SHIPMENT TO OUR FACILITY, WE WILL START SHIPPING SOON THANK YOU FOR YOUR PATIENCE . THESE ARE IN VERY HIGH DEMAND SO WE ARE OFFERING PRE-ORDERS. IF YOU ARE IN A HURRY PLEASE DO NOT ORDER!! ETA'S ARE NOT GUARANTEED, CANCELLATIONS WILL NOT BE AVAILABLE!
True 4-Inch Catless Downpipe for the B46 engine. This downpipe features a 4-inch diameter all the way until after the flex pipe for maximum exhaust flow. It will bolt up to your stock exhaust but if you want a 4-inch custom exhaust all you need to do is cut right after the flex pipe and weld for a true 4-inch turbo back!
No more fiddling with seized OEM clamps! Everyone has heard horror stories on how the oem clamps make installation a huge pain because they are often seized and due to their poor design it results in annoying exhaust leaks. When you purchase a downpipe we include a free aftermarket 3 inch v-band that will make installation much easier and ensure no exhaust leaks!
WHAT'S INCLUDED:
1x B46 4-inch Catless Downpipe
1x 3-inch v-band clamp
OPTIONAL:
1x "Heatshield Products" Lava Exhaust Wrap (KEEP YOUR ENGINE BAY COOL!)
1x Downpipe to Turbo Gasket (Required everytime you swap downpipes)
Biggest downpipe currently on the market and we have found our design gives a better tone than the smaller diameters from our competitors.
FITS THE STOCK GEN 1 B46 and Gen 2 B46TU EXHAUST! All B46 230i 330i 430i 220i 320i 420i
WILL NOT FIT ON A B48! MOST B4x IN NORTH AMERICA ARE B46s IF YOU ARE UNSURE CONTACT US!
Took awhile to ship but they warned me of that before purchasing. Sounds great on my car and was super easy to install. Came with all the required clamps and Kevin was very helpful and responsive with any questions I had. Will be ordering more from here soon!
The quality alone is 5 star, install was not as smooth for my 2024 230i xDrive. OEM exhaust uses a factory clamp-style slip-fit connection which will not work with the V-band flange on downpipe, unless you buy an adaptor. Had to cut the flange end off the downpipe but it did slide into OEM exhaust. Had to permanently remove exhaust hanger do to fitment/placement of downpipe; would not align up properly. The OEM downpipe bracket is a very tight fit for the O2 sensors. Took awhile to get the 02 sensor placement above bracket. I recommend cutting or removing OEM downpipe bracket. Also recommend purchasing another M8-1.25 x 60 bolt for the longer length when clamping OEM V Band clamp to new downpipe with new gasket to turbo.
Install was not too difficult & it looks amazing with the lava wrap! I put this on my B48. (Euro spec) No complaints on quality of the material or welds, amazing deep sound compared to other downpipes, and it’s fully able to work on the B48 if you’re able to weld a pipe to the downpipe or fabricate a custom v band solution with the band provided by IPOS!
Downpipe was bigger than expected and quality is solid, just installed it the other day and it went in flawless!
Rarely do you meet a person that stands behind their products and is there consistently to answer your questions and give you advice. IPOS MS is an amazing brand and its owner Kevin Jimenez is even more so. I had 20K questions and not once was he condescending. He answered them all and made me feel like I should as a customer with ZERO knowledge. I have not had any other downpipes installed on my vehicle but this sounds INCREDIBLE! It’s not obnoxious and very refined and classy as a BMW should be (Especially for a B48 4 cyl- It’s not an M5) . Just enough to turn heads but not like some rice rocket.