Our rear wheel drive K Swap 4-2-1 header provides the perfect blend of fitment, durability, and performance for the 1990-2006 BMW 3 Series (E36 E46) chassis, as well as other RWD K series applications.

It features 304 stainless construction, 1.75" primary runners, 2.25" secondary runners, a 2.5" collector, and 3" V-band outlet. This header is also built with our preferred cylinder pairing of runners 1-4 and 2-3.

This header is nearly identical to our NC header except the collector is shortened by a few inches.

Notes:

• This header has been confirmed to fit E36 and E46 vehicles with use of a slim passenger side control arm bushing conversion, such as Condor Speed shop kit for E36 and E46
• For universal applications using our 86 transmission solution, you will need to shave down the 86 adapter and 86 transmission about 1/4 inch for the header to install correctly.
• This header has been confirmed to fit a K24 Swapped RX8