Likely not the most popular option, but I plan to remain with OEM exhaust manifolds/cats on my LT1 with a LT4 supercharger. Various reasons to include concerns over German inspection and sound (car is bit too loud in the cramped neighborhoods!)
Nonetheless, oldman posted an image (which I've reposted-thanks oldman!) of opening up the OEM exhaust (lead-in to the main cats). This is interesting as my tuner (Jannetty) commented reducing the output restriction would make more power (obviously), but also reduce tendency for knock (reducing boost as well) which I actually run a can of octane booster during events to mitigate.
Wondered if oldman or anyone else has more details/images of performing the process.
I realize at 650 CHP, each manifold/pipe is accommodating 325 CHP thru a tube that would be considered a pea-shooter on the 60's muscle car dual exhaust. Assume any gain in this area would be multiplied.
