I have a B18C1 in my 1995 Civic. I am looking to retain my stock GSR throttle body and stock GSR manifold. But I want to bore the throttle body and port match the manifold to the new size of the throttle body.

I'm looking for all available shops in SoCal that can do this CORRECTLY.

I know I can go aftermarket, but I want to keep a perfectly stock appearance for stealth, smog, and legal reasons.

 

So there are other GSR IM faithful out there... I have not done it yet, but what I'm going to do is ship my throttle body and IM to George at WWW.MAXBORE.COM and he will bore them out both to 64mm- same as Skunk 2 IM and install a new brass butterfly. You would need to buy new TB and IM gaskets if you have never removed these pieces. I would not let an inexperienced shop do this for me. My parts are already in a box ready to ship, I just need to wait to get paid.

www.maxbore.com

 

you can do the manifold portmatching yourself with a dremel

 

is that what the shops do? I always thought they did the whole inside and mabye polish it up some too.

 

for a simple portmatch to the tb you only need to open up the manifold opening to match the tb. to get a full port and polish of the plenum and runners you would need to cut it up to get inside.