CamOnlyJabroni

392 intake manifold and exhaust manifold are a lot better than factory LT1. LT1 makes great power for its factory shortcomings. 392 is a tug boat motor with low rpm. C7 LT4 exhaust manifold is light years better than a factory 6th gen LT1/LT4 manifold.

Johan tuned my Challenger. He has the transmission shifting great. Here is a Johan tuner Challenger on the dyno.

OneSlowV

iTrader: (2)

Yea I’ve noticed that still seems like porting the 392 Intake shows some nice gains and going with a bigger Tb over the factory 80mm Tb I believe. Have you ran your car at the track yet ?

CamOnlyJabroni

Look up Peak Speed Shop. I fixed my ported intake manifold that got damaged in shipping and got it for free. Sold my factory intake manifold for $550 bucks.
I haven’t ran it at the track.

HioSSilver

iTrader: (8)

I could port those

CamOnlyJabroni

Yea send it to Hio. The main gains are smoothing/porting the throat to the TB size and taking the sharp edges out of the runners where the molds are connected together. About halfway down each runner there is a sharp edge sticking out all the way around.

Chris25

iTrader: (1)

Do it yourself nothing complicated about porting it. Just get a good mask and take your time with the cartridge rolls.