I received my intake runners from Throwdown, as well as the P2R gasket, and the part numbers on the gasket are for the 3G TL.

I would think between the 3.2, the 3.5 and the 3.7 that the intake ports are probably a little different in diameter, and the trick with intake work is always getting your ports to match and create no flat spots / resistance.

It's obvious with the polished runners I've received that some work will be needed on the gasket anyway, but not having the manifold apart yet, I don't know what the port diameter is on the heads.

Anyone had the 3G/4G manifolds side by side for comparison? If they're identical, no worries, but if not, putting these runners and gasket on there might actually be a power loser.

 

you'll need to shave the gasket to port match... I didn't go with a full ported runner as I wasn't running FI, and the motor couldn't injest that much air. If your runner ports are larger than the header ports and mani ports you might notice a power loss as the runners are supposed to increase the velocity down to the headers. This is why they are tapered, and why there nice notch by the injector port.

Before honing / extruding the intake mani, runners or porting the TB it's best to do a bench flow test to see how things are running first. Model up the ported parts to see if you can take advantage of it and go from there...

Our Intake Mani has already proven to be the highest flow mani... The motor is nothing more then an air pump. I know you know alot of this already Psedo, but from my experience working on the J37 so far it reacts differently then the J32A3 and the J358.

 

I think his question is more of " did i get the wrong Manifold" from throwdown. I would call them and ask whats up.