bowtie lover

i just got my 85 iroc z and it has the stock exhaust system on it. i am wondering what would sound good on it from opinions

ChrisC

Welcome to TGO. First, do you plan on replacing just the muffler or are you looking to upgrade the cat-back or the whole exhaust? As far as just a muffler, I've always used the Flowmaster 80 series but do a youtube search for different brands to see what you might like the best. If you want to upgrade more than just the muffler we can direct you in that way too

Ron U.S.M.C.

This is a video of a Flowmaster 80 series that IMO has the typical Flowmaster sound. Some like it some don't.
If you read down below the video it says its a cat back with 2 ½ in tips.That does not tell us the size of the piping but my Flowmaster American Thunder 80 series cat back came with 3” piping including the tips and sounds similar to this one but deeper.

bowtie lover

thanks for the welcome. i plan on redoing the entire exhaust system from the manifolds back and i want to do true duals but im not sure how i can run them yet if i can run them at all

white_ghost

do you have to keep the CAT? I have a 91Z28 and not sure how guys run "true duals" without running into a drag issue. Using Heaman Shorty headers, a Magnaflow exhaust, 2 1/2"pipe all the way. I would like to see underside clearance myself before going with duals all the way back from manifolds. Plus everything as far I can see has to run down the passenger side. (no pockets or tunnels under drivers side.)

bowtie lover

i can get my car to pass inspection if i have it straight piped so no i dont have to keep my cat. i would like to keep the cat just get a high flow one and idk about the true duals yet because i havent seen it done yet

ChrisC

Do a search or look under the exhaust forum there is probably a sticky or something on true duals...In my opinion you are better off running shorty's into the y pipe that the header manufacturer makes or recommends to use for those specific headers, then into a 3 inch cat back. (we can get into brands if you want to go this route.) You will save yourself a headache and will not sacrifice any noticeable power if you go with this set up opposed to say 2 1/2 inch true duals..and that's not even taking into account clearance issues. Just my two cents though

bowtie lover

ok well if i stay with the headers and y pipe what would you guys consider to be a good set up? money is no real issue with me cuz i dont care what i spend on my car. should i go 3in all the way back or what? stock cat high flow cat?

bowtie lover

ok so i think im going to install a borla exhaust but i would like some oppinions on the cat type muffler type header type and y pipe. im new to changing all of this so i really would love some oppinions. im sorry if im asking a question that always gets asked

Bbourk89

okay hi to all i have an 89 camaro 305 tbi and i was wondering if i could use the flowmaster 10 series muffller 1 inlet with dual outlets even though its not a crossflow muffler, i intend on hooking the cat pipe to one of the dual outlets and have a pipe running out of the other outlet and another pipe running out of the inlet like the crossflow setups. will this work Please give FEEDBACK!!

bowtie lover

ok so ive looked up and this is the cat back system im going to get.
http://www.summitracing.com/parts/bo...maro/year/1985

my question is what cat y pipe and headers to get?

ChrisC

Dyno Don's headers. He's on this forum just send him a private message. His are the best. He can also help you with a matching y pipe. As far as a cat goes, I'm assuming that emissions are lax in your area and you posted above that you don't need a cat to pass inspection...so if I were you I would do just that.

bowtie lover

thank you and i sent him a pm

ChrisC

Nice man, keep us posted on the outcome.

bowtie lover

will do. im trying to get a price on the headers and y pipe so i can get the money for them

ChrisC

Yeah I've never dealt with him or his products directly but I've heard excellent reviews. You can probably search for other posts about his headers and maybe get a general idea of price

abray1

I have a 4 inch system with a spintech 4x3x3 muffler and I couldn't be happier. Over 400 at the rear wheels (over 500 trq) and it sounds awesome.

camarotucker

iTrader: (2)

You will need (1) lumpy cam (1) set hooker 2210's (1) Flowmaster 50 or 40 series.

Ron U.S.M.C.

OK, I'm going to ask just how does this system work.It looks as if only one pipe is going through the muffler. And IMO I would reconsider that 4 pipe tip style.

ChrisC

I think the system allows for you to either flow through the muffler and out the one tail pipe with the block off in place on the other side or through the straight pipe and out of the other tail pipe with the block off out and residual exhaust floating over through the muffler...I don't like the design either, IMO.