86 iroc-z 383sb

so im running just short hedman headers at the moment and want to get some kind of pipes.. somehting from like 350 and down i was just wondering do i need to run true duals with my 383 or can i run the y pipe single tube and split into duals in the back whats my best choise or whats better???

gmstrong

Most people would say single 3 or 3.5 inch pipe.

ironreaper87

Run duals if you have the time and money to do it. But a single 3 or 3.5 would be fine. I just think duals have a better sound to them, with an X or H of course.

355sleeper

iTrader: (4)

how much power are you getting out of the 383? if you are over 400hp i would go with a single 3.5

cost wise with a single 3.5 you will be around where you want to be..roughly $350 IF you buy mandrel bends and buy a nice muffler

now if you run duals you need twice as much material and 2 mufflers. keep that in mind

VincentZ28

iTrader: (2)

It's about 5hp difference between the two. Not worth the money and hassle.

ironreaper87

I think you meant to talk to the OP but anyways.
I have a mildly built 350 and I threw down about $1200(including headers) or so for Stainless mandrel bends and two mufflers (classic chambered powersticks)

355sleeper

iTrader: (4)

sorry i was talking to OP

but thats crazy.. im using 16ga mandrel bent steel, my muffler was $120, i couldnt imagine buying another one lol. and all the individual bends put me around $350

86 iroc-z 383sb

yea im running 560+ hp and around 450 tourq but yea i think ima go with the single i wish i would role on headers but i already got a fix it ticket lol what brand would be best??

355sleeper

iTrader: (4)

for headers? im using hedman longtubes

86 iroc-z 383sb

yea idk here in arizona there kinda picky so yea on my way to the muffler shop i got pulled over for idling at a stop light then taking off.. cop said exessive noise said some kind of code and bam i got a ticket... i dont see it that loud but yea im not running any kind of piping just the short headers... how loud is yours with the long tube?

355sleeper

iTrader: (4)

it will be through a magnaflow muffler. its 28 inches long overall. it should be quiet just cruising around

when i had stock replacements and the duals on it...it was really quiet really. you could here the cam over everything

next time be sure to tell the cop, if you put your car next to a stock harley, you wouldnt even be able to tell its running

86 iroc-z 383sb

are u running cats??? or no?

VincentZ28

iTrader: (2)

My Hooker Maxiflow Muffler is quieter than Magnaflow.
Here's my car with the Hooker Maxiflow
http://www.youtube.com/watch?v=17nKp...3&feature=plcp

Here's Dyno Don's car with a Magnaflow.
http://www.youtube.com/watch?v=k50-H...7&feature=plcp
Here's my car at idle with Hooker Maxiflow Muffler. Remember these cars have dual cats with a single 3in cat-back system.
http://www.youtube.com/watch?v=HuQNK...feature=relmfu

355sleeper

iTrader: (4)

no cats

pwdbychevy

I was running a single 3" on my 383 but went with a custom made dual 2.5" with x-pipe. It sounds alot better than the single exhaust. I'm not sure on power increase since the 383 was making over 500ft lbs of torque already at the flywheel so a small increase wouldn't be that noticeable.

duf6

I agree that true duals sound better to me, thats the only reason I did duals and not a catback.

VincentZ28

iTrader: (2)

Just by putting cats on the car will quiet it down some.

355sleeper

iTrader: (4)

3.5 inch high flow converters are like $150. ill see how loud it is first, if its too loud, i will buy one

88IROC350TPI

Where do you get this 560+HP figure from? Have you run the car on a dyno or at a race track? I strongly doubt you make any where near 560HP especially with Hedman shorties.

86 iroc-z 383sb

pwdbychevy u think u can snap a shot of ur underbody see how things look under there with the piping im just undecides i want the best sound from my car like a BEAST!! but not flow master or magna dont like the sound of that .... what do u guys think abot bullets? hawks third gen sells slp bullets for a 100 a piece just cant find any videos on youtube on how they sound so dont want to just on them...

lolvtec

i just moved back from az i was running long tubes and true duals and never got pulled over for sound but when i went to get emisions i failed everything lol no cats no smog no mufflers

pwdbychevy

Here is my homemade y-pipe



And the rest of the system

pwdbychevy

2 more

92droptopws6

iTrader: (10)

Let that car breath true duals with an X pipe and your choice of mufflers
FWIW I had 1-3/4"longtubes and a 3"Y pipe and picked up 1 tenth going to true duals on a bolt on ONLY Lt1 so I am more than certain a larger CID motor w/ cam and heads will benefit









I know I have a 4th gen however it is similar as far as routing