Unlock the full potential of your BMW B58 Gen2 engine with the Penta Autoworks High Flow Downpipe.
This is a proper high-flow downpipe for the B58 Gen2. It gets rid of the restrictive stock cat and OPF so the turbo can breathe and spool a lot faster.
You can choose between 4.5" or 5" diameter, for or not for OPF, and in gold or silver finish. Everything is built to bolt straight up to the stock turbo and work with both factory and aftermarket cat-backs.
What you actually notice:
-Quicker spool and better response
-Noticeable power gain (especially once tuned)
-Deeper exhaust note
-Lower EGTs under load
It’s a straightforward, no-nonsense upgrade that makes a real difference without any complicated install. Just pick the version that matches your setup and you’re good to go.
