picked up a used itr manifold and Im planning on running it on my ls motor. all bolt holes line up except 1 and Im going to have to redo the coolant line placement

Im wondering if there is a difference in the skunk2 casting vs a itr mani, because Iv heard they are an exact replica. also wondering if they are different how much better the skunk2 is for my setup?

10.7 to 1 cr
stock bottom end
milled head and 1 ply
built ported head with gude performance cams, iv been told they are similar to crower 403's but I believe they are a little bit more aggressive.
adjustable cam gears both advanced about 4 degrees to make up for milling of the head
jg eddllebrock header
2.5" exhaust no cat just test pipe
3" cai made by yours truely from cummins charge pipes

shooting for 170 whp and a good strong power band
car is mainly used for d.d. and light to light mustang whooping
2000lb hatchy

 

shouldnt see such a difference between either manifold, but oem is always good

 

Advise from someone who has done it, sell the ITR manifold and buy the correct one.

I bought my used blox mani for $50, sell the itr for $100 and look around.

 

Depending on which dyno you will be I highly doubt you will reach your goal.I made 162whp with good bolton, compression and 404 in a b20z.

 

your most likely right. but we can always hope right

 

Very interested in these results since i have a p30 that i have been wondering about on my ls head.

 

iv been looking for almost 2 months for a decent buy on a used ls i.m.

but my itr is up for trade for a skunk2 or blox i.m.
pm me if you got one.