it was erick's racing. it may have looked stock on the outside but the inside is a whole different story.ABCsR2EZ4Me said:The gsr manifold is good by itself... I think it was (something) racing team that build an all motor than used the gsr manifold... its got potential
a stock itr manifold will not fit a p72 (gsr) head. where do you think the type r mani makes its power? thats right, in the top end. and where do you think skunk2 got the design for their mani, from honda. they just took honda's design and changed the bolt pattern to fit different heads.SoSublime68 said:I've got a gsr head...itr c5 block and the itr intake manifold wil fit....but the skunk is alot more top end power than the type r.