rx7speed811

i just want to make sure because i am (finally) ordering silicone couplings for my FMIC and intake hard pipes, and im feeling too lazy to go outside and pull a hose off to measure, hopefully one of you guys will be generous and share the knowledge...

are the stock intake/intercooler pipe outlets (intake elbow, y-pipe crossover, first and second turbo inlet pipes) 2.75" in diameter?

also, for you guys with hard pipes and SMIC/FMIC's, have any of you successfully tried stretching a 2.5" silicone coupling to fit onto the stock pipes? can silicone handle stretching that much, or if my intake piping is 2.5" is it imperative to get the reducer couplings?? they are way more expensive, for a quarter inch of difference.

oh and by the way, i am ordering the silicone pieces, as well as new vacuum hosing from baker precision. they have very reasonable prices for silicone hosing and it is supposed to be pretty decent stuff, in case any of you guys are looking for that stuff.

maxcooper

The stock pressurized pipes are 2.75". I am not sure if you could stretch 2.5" to fit, but I have a feeling it might be a problem if it made them want to pop off. So, I would not do it.

The Baker hose is pretty nice -- that is what I am using on my car. It is easy to cut, but hard to cut evenly. For that reason, you might consider measuring what you need and seeing if Baker can cut it to length for you.

-Max

rx7speed811

thanks.

Trexthe3rd

The turbo hoses are made with synthetic fibers laid into the wall of the hose and designed NOT to strech under pressure (boost). The 2.5 will not stretch over 2.75, if it did, you are using the wrong type hose. What you need is a 2.5/2.75 reducer coupler. Check this link thermalflex for all your hose needs.