Yea, I think I would get rid of that mani and go with a skunk2...

 

below 8200rpm, dyno proven, a b16>typeR>skunk2, ofcourse you would have to modify to fit a b16 or typeR mani, but I bet it would be cheaper and better results than buying a skunk2.
also the test engine was a b16, but I imagine the results would be similar on a b18c

 

i dont think there's any differnce between skunk2 and itr manifold..maybe the runners are a lil longer but thats it

 

I'm working on the P28 IAB conversion to turn P28s into P72s without knock boards for you GSR people... Should be wrapped up soon, then I'll start doing the conversions with chipping.

 

i used to leave mine open until i swapped it out w/the skunk2. the skunk2 pulls nice, it's designed off the typeR so i don't think it's worth your time to try to modify a manifold that isn't for that head.

 

ditto. it takes about an hour to completely remove them. or you can just run vacuum to them to keep them open. but my advise is take them out, or get a skunk 2.

 

thanks for info

 

leave them in, cold start sucks if you take them out

 

The shunk2 needs to be reworked. Needs to have the injectors moved farther up the runners to help better fuel mixer.

 

i have no problems with mine