B58 4.5" Downpipe Downpipe Configuration:4.5" GESI Gen 2 Catalyst or upgrading of your turbocharger

or upgrading of your turbocharger at any time

with fantastic torque and "area under the curve"

"T3" inlet flange

While this kit includes everything needed to convert to a single turbo set-up without additional fabrication

B58 4.5" Downpipe Downpipe Configuration:4.5" GESI Gen 2 Catalyst or upgrading of your turbochargerOur first B58 Product is now finally live. It may seem excessive, but we spent a better part of a year running this downpipe on our own M240i to ensure performance, reliability, avoidance of CEL's is guaranteed. While the market for B58 downpipes is addmitedly saturated, the craftsmanship of our OEM fitment B58 downpipe simply cannot be beat. In a sea of rebranded offshore downpipes and overpriced options with mediocre fabrication and welding, our