Borla Question

[jaberocs]

i was looking at the borla catback system, and i was just wondering why one tip comes from the muffler and the other doesnt. does this hurt/better performance? thanks

Borla

[Little G]

no it comes with interchangeable block off plates allowing you to completely block off the muffler and just go straight out.

[jaberocs]

so that section where the tip doesnt come from the muffler is actually a cut-out?

[LARRYfireBIRD33]

Actually what LITTLE G said was wrong. The plates don't block off the muffler at all. They block off the passenger side outlet. The passenger side outlet does act as a cutout, as none of the exhaust gasses that exit that outlet go through a muffler. The adjustable plates/blockoff plate give you the flexibility of how much air you want to exit the cut-out. There are 4 plates. 1 blockoff plate where all of your exhaust goes through the muffler and out the driver side outlet (none through the passenger side). The 2nd plate is a 1.5" diameter size plate which allows a good amount of air out the passenger side and the rest through the muffler. Then there is a 2.5" diameter plate and a full 3" plate which is basically a complete cut-out. However, it's not hard to make your own plate as myself and other members of this board have done. I hope that clarifies some things for you.

[1DangerousV6]

^ yup..i have the full 3" borla cat back system..fully open..love it!

[jaberocs]

but is it legal to have the exhaust going through the passenger side outlet, without it going through the muffler? im in California so emissions are tight

[foff667]

Originally posted by jaberocs:
but is it legal to have the exhaust going through the passenger side outlet, without it going through the muffler? im in California so emissions are tight

emissions wise its a non issue...mufflers muffle as far as noise regulations go thats a different story.

[1DangerousV6]

yup..you can have an aftermarket muffler..even one that allows exhaust gasses to flow past it like the borla system..but it has to be within a certain range of dbs..i forget what the range is..i know here they actually have something they put down by your muffler to check it..never had it done to me though

[98goldbird]

I live in CA. I have a Borla. I passed Emissions.

[jaberocs]

thanks 98goldbird. i dont have to worry about that anymore