well fellas, my dual exhaust is done. i used 2.5 inch pipe and 2 hooker chambers (2.5" offset inlet and 2.5" center outlet, part # 21502). i love it ....it sounds loud and great. here are some pics..

 

clearance is great at the front...the mufflers at the back are the lowest part....it was pretty easy...my best friends dad helped me.

sorry about the pics guys...my friend and i had to cut alot off them to make them fit

 

another

 

more

 

oneside........

 

the otherside...sorry this was all one photo but my friend and i had to split it to make it fit on here

 

Cool, I'm doing the same thing except with 3". Got the parts last week, now I just gotta find time to do it. Did you use shortys or longtubes? If you used shortys, how did you run the pipe from the collector to the side of the tranny? Thanks

BTW, could you get some sound clips?

 

man it looks great! How much did it cost for everything?

 

it cost $307 dollars canadian for everything, and that includes the 2 mufflers and labour for my mechanic to help me install and weld it. together we did it in slightly under 3 hours.

i already had flowtech shorties on the car and we used very short collectors and then welded them to some 90* (roughly) bends.

 

i dont have anyway of getting a sound clip on here...i dont think anyway unless one of my friends hhas something....so liekly i wont be able to get one...sorry

 

Looks good, is that the finish that the Mufflers come with? Or did you paint them black?

 

So you just went from the collectors on the headers straight to a 90 degree angle right? Did it fit in there alright? Does it need to be a little less than a 90 degree angle? Thanks

 

the mufflers come with that flat black finish.

umm...yeah its like at least a 90* bend...basically right off the collector. this fit quite good and ground clearance is very good at the front.

 

whoaa... just dont hit a speed bump and you will be ok ..

im thinking on trying to put 2 flowmaster 40's (maybe 40's think it might be too loud? cops suck here) in the place of the OEM muffler if i can come up with a way to get them in there ...ill definately need a heat sheild for the gas tank ..my fuel already boils alittle ill take pics once im done ..dunno how long that will be though ..need a tranny first.

 

I wouldn't pay $50 for that cobbled up hunk of scrap metal. :nono: Sorry, but until you've seen professionally made mandrel bent dual exhaust systems with crossover or X pipes made with 304 or 409 stainless you would settle for no less. And just to think, for about another $200 you could have had a really nice system that has some ground clearance. Yes I realize some people are on a budget, but IMO you paid too much for what a ******* could have performed in his driveway for a 12 pack of Busch.

Sorry but just because we all drive around in the same cars doesn't mean we are all going to agree on things.

EDIT:

I just went back and read a little more carefully and realized that this is done on a 15 second car. Friggin genious at work

GM DIDN'T PUT DUALS ON F-BODIES FOR A REASON. sorry- yelling... The cars don't make enough power, nor do they have anough floorpan space to house two full sized mufflers.

On 450+hp cars duals are necessary and can be a great thing when done correctly. When I say "correctly" i mean altering the rear floorpans under the rear seat area to house the mufflers, then alter the crossmember on the drivers side so the pipe can be tucked up out of the way. Then duals are made with mandrel bends and TIG welded nicely.

When you drive your car for any period of time thinking its sooo cool scraping on every driveway and drumming your brain going down the road, think of us guys that have a nice sounding professionally installed system that have absolutely no ill side effects. :lala:

 

maybe he likes it. some of us dont have alot of money for cat back. I t does sound like it costed you alittle more than usual though for true duals though.

 

I agree 100% with IROC57TPI...I have 1 5/8" Hedman headers with a custom y-pipe to a single 3" pipe all the way back to a single Aerochamber muffler with a single driver's side tailpipe...This exhaust is all mandrel bent, and cost me under $300 (minus headers which is another $100) to have done locally. I know that this setup will take me into the 12's.

Why do this on a 15 second car again? I had a similar ghetto setup on an 1981 Grand Prix that my 406 was in...and it sucked cause I had no ground clearance and the exhaust drone was annoying...

I am going to go out on a limb and say that the owner here is a teenager....

 

thanks for all the comments, both good and bad, fellas. i am can understand why some of you may think i was stupid to put it on. now you guys are saying i paid too much, but lets remember thats canadian dollars. i paid $ 80 canadian each for the hooker aerochambers, which go for 50.95 American in the summit catalogue. anyway one who has ever bought speed parts in Canada will tell you i got a great deal on the mufflers.

now i agree ground clearance is the best at the back of the car...but the hooker mufflers ae 4.5" thick. if i had gone with thinner mufflers i would have more clearance....but thinner mufflers would have cost more and yes i am on a very small
budget.

as for sound it is very deep at idle till about 1000 rpm..however it is surprising quiet just crusing..even at 60 to 70 mph. but when you get on it...it roars...love the sound.

as for putting it on a 15 second car...yeah it may be over kill for a 305, but my mechanic has a freshly rebuilt 400 hp 350 waiting for me to save up enough...likely by the end of july i will have enough for it...the duals will serve more of a purpose then. the other reason i went with duals was i wanted the nice deep sound that duals provide.

by the way...this setup cost me about $80 less than the cheapest cat back...the 2.5" dynomax super turbo system i had on before.

if anyone else has anymore comments feel free to post

 

Well I'm glad to hear you are satisfied with the results. It is everything you expected it to be. It sounds good at idle, roars at WOT, is fitting to future mods, and was within your budget constraints.
:hail:

 

yeah i cant believe how quiet it is cruising around. i wish it was a little louder actually..hhehee...well maybe not.

the thing to remember is that speed parts are very expensive in canada...so really i got a good deal on the system...there are a couple of bends in it...but they arent crimped or anything...they are squeezed a bit...but not that bad.

overall i am very happy....plus its something different.

thanks for the reply

 

I do hope that you are happy with it...cause you are stuck now anyway....

The groupthink out there is that you MUST have duals on every vehicle for power....I can appreciate your upgrade in the near future, however for stealth, ease of installation and cost, you still should have done a single 3" mandrel bent pipe from the cat back...It would have been cheaper in the long run.

Besides, I really like the stealth factor of a single 3" tip...people can't figure out if I have a built V6 or a 305...no one ever guesses a 406

Good luck though with the rest of the upgrades...

 

i used to have true duals (2.25" pipes though)on mine it only cost me about $120 with tail pies too. but that was on a modded 305 (ported heads&intake ,cam,gear,stall,etc,etc, ) but i fell in love with flow master single 3" set-up ,sound, and unassuming look, and clearence,
have fun and enjoy YOUR car.

 

Is that a FRAM oil filter?

 

These prices u guys are saying are un-heard of


Just for installation local shops want $400 for headers and $300 for the rest of the piping from the cats to the muffler and out...


Then i have to buy the headers, mufflers, and cats in the first place... This is gonna be like a $1500 job for just a imple exhaust system....

Guess it would be cheaper to go out of NY to some other state....

 

Hey QuickL98, thanks for proving my point...Glad to know I am not the only voice realizing this. I bet your car sounds different (still wicked) and also runs 12's...way faster than the other posers with overkill exhaust systems on slow cars....(This is NOT in reference to darbleinad, just to most of the other groupthink slow people out there)

I agree to enjoy your own individual car, but I still see way too much misinformation on this board about overkill exhaust and what is actually needed to achieve certain power levels.

Sure, long tube headers seem like a good idea, but not on a daily driver for ground clearance and not until over 450 HP or more.

 

about duals on a 15 second car? I know to me a it makes it a hooptie. I have to agree 110%- its overkill. You don't have to agree with my opinion.

 

you claim our prices are way to low, sure... but with exhaust you do get what you pay for most of the time, mine was cheap cause they used regular pipe that wasnt even aluminized , so its garuanteed to rust over time, bigger isnt allways better.
my headers were only 120 bucks plus i installed them myself, i supplied the "weight loss" cats and they did the rest.
i cant tell you how much i hated that passenger side pipe after i dragged my first speed bump, it rattled like hell against the X-member.
and then i would see all these dudes with 383's and 355's hualling *** with just a single 3" plus the exhuast note sealed the deal for me , when i put my 355 in i gladly ripped that hoke bull **** from underneath .
Darbleinad if you seem to loose alot of bottom end i would have some tail pipes fitted.

 

I believe u on taht quick... i didnt ask if the piping was mandrel bent or anything special, i just wanted a quick estimate... thx

So what would be better to go for? Dual cats with 3" exhaust system or should i just go with a single cat with the 3" exhaust system to the muffler...

Parts i have in mind so far are SLP 1 3/4" headers, flowmaster 80 series muffler... I am gonna have a shop make the 3" piping... single or dual cats is the question....

 

i have dual cats on mine but dont have anything near what you might expect, since i have a 7OT. oilpan i couldnt an OEM style y-pipe that goes between the engine X-member and pan so i ran mine similar to the new LS-1 powered cars so my headrer pipes dont "y" together until behind the tranny. i useed a FLOWmaster y collector an then ran my single 3" exh . from there.
i would think dual cats would work better. then tied in with the stuff you said you have

 

Thanks quick... I guess i'll just go with dual cats and have the shop provide them for me...

And i am getting subframe connectors and i have looked in many different places, and they all vary in looks and prices...

I finally chose one from summit: HSS-4001 weld-on, steel, black powdercoat, subframe connectors ... $187.95 (for dual cat cars)

Is that too much? Or are there better ones out there? I want to have the shop weld these on first then make the exhaust around the subframes if they come in they way...

 

sadly enough i have to say that i dont have SFC's on my car yet u have the jegster weld in ones , but you have to cut up the floor and stuff so , i'm going to have to look at other brands . ireally need to something soon ! because i have a t-top car also.
make sure the shop of choice uses aluminized pipe. i have an '88 formula that i'm getting ready to put up for sale and i had an oem replacement "L98 /2.75" intermediate pipe and a single hi-flow 3" cat exiting out of a flow-tech afterburner 3" in and 2.5" x2 outlets. this exhuast is about 4 yrs old and still looks good, no rust. grand total was $330 with parts and labor.
granted the car is only a TBI w/ 2.73's but at that time i was planning for a 355 to put in, that wound up in the car below
i like the sound of the flow tech . deep and rumbley( spell check)

 

sorry
i fat fingered up there i ment to say that I have the jegster weld in SFC's

 

i am the first to agree that exhaust is over kill for my cammed 305, but like i said i will have a bult 350 soon ( my mechanic and I fired it up monday night...boy does it sound sweet). i got a great deal on the mufflers so i decided to get 2.5" ones as they would more than handle any future mods i would make.

also, i really wanted something different and louder. everyone around here has a performance cat-back system or stock exhaust. i found my dynomax cat-back system (with flowtech headers and a straight pipe where the cat was) to be too quiet and i love the sound of a chevy V8 breathing headers and true duals w/high flow mufflers

also i still had the terrible, crimp bent factory y-pipe on my car and the flowtech y-pipe to match my flowtech headers would have cost me 195 dollars canadia

 

is somebody jealous they dont have true duals

 

holy ****, remind me to never post anything on this board again about modding my car. Damn guys, he did the dual exhaust mod, thats what he wanted, I didnt realized that IROC and the rest of you guys were the exhaust guru's or something. Son of a bitch, so you dont like true duals, thats great, I'm happy for you. Geeeez.......

 

POSTING HERE YOU HAVE TO BE OPEN FOR CRITIZISM...
"NATURE OF THE BEAST"
I FEEL YOUR PAIN
MOD WILL CLOSE POST

 

i agree DTL504. i have no problem with critizism and like you say, when posting you have to be open to critizism. after all, everyone is entitled to their own opinion.....

 

I agree, the boards are open to all opinions.... BUT only when asked for an opinion...

The man asked a simple question, he was looking for answers not what other people think

 

Amrish, in a public forum, when a person asks a question, he will get an answer. Maybe it won't be the one he was looking for, but in most cases that is good. If someone is asking for input, there is a lot of experience on these boards and many different situations. Most importantly, there are people here who know the limits of given combos.

In short, my answer is what I think...what else would it be? Most other people on Thirdgen answer as I do. Am I supposed to lie and respond with something other than what I think?

Topic: 2.5" duals are about right for over 400 HP...meaning they aren't a hindrance at that point.

 

I am going for dual 3" along with headers and i have a stock engine right now...

So ur telling me not to get a dual system, until i do more engine work? Some of us dont have the $$ to do everything at once, and make a 400+ hp engine and get an exhaust system at the same time...

We build up slowly, and its pretty damn stupid to get a cheap exhaust system until u decide to build up, thats just wasting money until you build up a better exhaust system for a second time...

 

Someone hurry up and call the fire dept.! I see flames

Like I told him, it works for him so thats all that really matters. I also pointed out that it was a bad decision. Sorry

 

It is far better to have a 450 HP motor choked a bit by smaller exhaust than to have a dual 3" system (way overkill, unless you are at 500 HP NA) on a smaller HP engine. It will kill throttle response.

I am not flaming anyone here with what I have said, at least, I haven't thought I was. No disrespect intended to anyone here.

The fact is that there is a LOT of misinformation in the car world and facts are tougher to come by than an opinion, cause everyone has an opinion...most are uninformed opinions though. I just know that I have been researching and experimenting for 10 years now and am still gathering knowledge. Why? Because of the misinformation out there.

Lastly, you can screw up anything you want to on your car, I am not your Mom , at least last time I checked...See, I also don't get off with a need to control what others do, just trying to help. If you look around...you will see that most people get there info from others, not from fact. So groupthink is a big problem.

Good luck in what you want though.

 

i have to agree... with the above statements. my .02 ....with everything in life not just cars, i always consider the source. i think for the most part people here will try and guide others in the right direction. alot of us have "been there done that" with our cars.
regardless of what advice a person is given they usually set out to do what they intended in the 1st place. and sometimes wind up scratching there head down the road.....saying"**** ! i should've done what they told me"

 

Exactly...BTW, look for my new post regarding header size and power. Interesting info.