The M240i / M340i SAVAGE is our big-single kit for the Gen 2 B58 in the G42 and G20, built on the same hardware for both chassis. Hot parts are fabricated in-house so the packaging is ours instead of a vendor's. The manifold, 4" downpipe, and turndown are welded up as one assembly, which keeps the runners tight to the head and prioritizes the wastegate so exhaust energy reaches boost control before it hits the turbine. We run the Turbosmart GenV HyperGate45 to keep that control honest under load.
The fittings and block adapters are machined in-house. Oil feed, oil return, and both coolant block fittings are cut for the B58, so they seat clean without stacking adapters to make something generic fit. The drain line, the Sportsman 10AN oil drain outlet flange, and the 22" stainless feed line are built to the kit, not adapted to it.
We don't modify the compressor housing to make a turbo fit. That's on purpose. You can swap turbos at the track without cutting or welding, so when your combo changes the kit doesn't fight you.
Select your turbo at checkout, or choose No Turbo and supply your own.
Important, read before you buy: This SAVAGE kit ships with a 4" downpipe and turndown. Running a full exhaust means going 4" all the way back, or modifying your existing exhaust to mate to the 4" downpipe. Plan for that before you order.
