Delivering an improved exhaust note, without creating unwanted cabin noise, these T304 Stainless Steel Downpipes are the perfect upgrade to your M3 or M4.
We recommend remapping the ECU in order to prevent potential "check engine light" warning signals. We can package a JB4 together with your downpipes to ensure an error-free install.
-Made in the USA
-T304 Stainless Steel
-Hand TIG Welded
-Covered by Shifteck's NO QUESTIONS ASKED lifetime warranty
-100% perfect fitment and space for O2 sensors
-For off-road use only; not 50 state legal
Fit and Finish are great. All the tabs and studs are exactly where they needed to be. The Vbands glided into place with ease. While the welds aren't "OMG Japanese Welding Porn" they look leak free and robust. They aren't ground down to hide their existence - I can appreciate an honest weld. I like that the Stainless is not polished and natural in appearance. So when they change color it won't be as gross and uneven. And, installation was easy.