Ok, so here is my exhaust now. it is hooker 2210s with 3-disk inserts. Then 3" true duals with Dynomax bullet mufflers and then it turns down. I built it myself in my driveway. My problem is it is way to loud for my HUGE, and i mean HUGE cam. This thing needs to Idle at 1K at least. (that must be why it makes 500 Hp) So anyways, here are my Q's: 1. What is the best way to make an H pipe? I have more 3" tubing, but what is the best way to make one appart from the obviouse. Is it really the end of the world to have it be solid and the entire exhaust be one piece, or should I really put the time in to have there be a clamp in the middle? 2. Has anyone gone from turndowns to side exits easily? I do not want tips showing, I just need the sound shot away from the car. It is TOO loud as it resonates off the pavment. (Some sort of oval turn or something) I guess that is it for now. If these get answered I will have a couple more Q's. (Please speak from experience, or post pics. There are too many people who love to post random facts and crap about exhaust, I really just wanna get this done) Thanks again. -Dennis

Get a set of 45* turn downs, and use those on your dumps. But don't point them straight down, point them about 45* down and out towards the side of the car.

This made a pretty big difference on my cousin's big block Ford. He had 2.5" exhaust into mufflers, then a straight pipe to the axle after the mufflers. LOUD. He added the turn downs the same way I described and it made a very noticeable difference. Much quieter.

I will try that this weekend I think

and vids or audio of this i want to hear what it sounds like

The only reason I see to having a clamp anywhere is for ease of slipping pipe together. It allows for f-up room.

Via the power of a tape measure... I made my pieces parts, tacked them together on the car and welded them up (off the car). If you have everything lined out where you want it... no reason to use clamps.



There are flanges at the rear so the exhaust can be removed but, no clamps.

i could have told you before u did that setup that it would be very loud. a crossover pipe would help you out some but its still gonna be loud. it might change tone, and balance the system for some power but still loud.

try different mufflers...chambered tube or something like ultraflow rounds from dynomax. maybe hushpowers?

no round "Race" type muffler is going to be quiet. i'm thinking of welding in some cutouts and some turbo mufflers instead. summit sells them for $15 a piece and then i can always remove the 3 wingnuts at the track for each side for a free flowing exhaust.

Yeah, I used to have an elctric cut out. There is no room for all the flow I need and a cut out. It is just not worth it.

I also don't wanna change mufflers.

I am a pretty good double checker and I allways tack weld on the car. I will make it all one piece. I will add the H pipe and cut the turn downs and make them point more sideways.

Then re-asses the problem.

I am still trying to find a way to record the sound, and get video. I need to borrow a camcorder. Oh well, till then, pics will have to do.

Thanks for the help.

Hope it works out.

I can only imagine how loud that is....the full dual 3" over the axle exhaust on my car with chambered rounds is very loud....
I took it around the block a few weeks back. Some guy was walking down the street, so I just coasted past him (trying to be polite) and as I was rolling past he gave me this ****faced look (more like a scowl) so I think to myself...."fine a$$hole" and I gunned it....I see the jerk in my rearview turn around with this look. I was about 5 blocks (suburb blocks) from my house at that point and my brother who was outside at my house heard me from there.

lol, yeah. I am worried a little about stuff like that. I really don't wanna change my mufflers, but I might have to. The dynomax bullets really don't do anything.

I do have inserts in my headers that really do make a big difference, but I allways imagined my car as a strong rumble, Now it is a HUGE MASSIVE rumble, lol. I love it, but I know I can't drive it around all the time like this.

I am thinging of other solutions.

For now I am gonna leave it all alone, till the car gets fully tunned and painted. Then I will worry about details.

But thanks for the story, makes me feel good knowing I am not the only one who gets dirty looks ( I used to get them when the car was stock)

Looks like you have the Spohn crossmember with torque arm / t-56 setup. Hows your ground clearance look on the drivers side and did you have to do any fabricating or did you just tuck the exhaust up as close as possible? I have the same setup but I'm not running true dual and its a PITA right now with exhaust. What are the specs on your cam?

No i did no fabrication. I dimpled my pipes and tucked as far as I could. I have 4.5" at the lowest point, which is .5" less than stock, for me.


As for my cam.... Honestly you probably don't wanna know, but just for fun, here is the cam SPEC sheet.... Its a crazy, not so steetable CAM, but hey, it will be fun.

246/254 with mid 500s lift isn't a HUGE race cam. that's a streetable combo definately. i'm running 242/246 similiar lift with a much tighter LSA and mine idles at 1000 in gear. those mufflers aren't going to quiet it much at all. FYI I ran open headers and dual 2.5" with spiralflows at the track and ran the same times, so dual 3" might be a slight bit overkill.

put some vortx cones in the tail pipes that what we use on race cars

my car is stock with fulll ehxaust and 2800 stall and i get some of my neighborhood shouting slow down... when i'm doing 15mph and crawlin up the hill on the converter...2500rpms LOL

i cant wait to see what they think when i go 383 or 406

Yup, that setup is loud. Here's a video of mine during a burnout. Same mufflers and dual 3 inch dumping before the axle.Click here

Why not run a pair of Hooker Aerochambers? The flow great, sound badass, and aren't as loud as what you have there.

Nice sounds good!

Man I want to hear this thing, lol!

Looks good though Dennis!

I have the exact same setup except I run a much bigger cam. If you put about 6 more inches of pipe after the mufflers then put your turn downs at a 45 degree angle it will be much quieter.

What kind of power is your motor making?

Well, if you guys say it is possible to make it quiet, then I will try.

I will do it after the car is done thought. I just got a wideband O2 off ebay, so that will make tunning and such that much easier.

Anyone recomend a nice quiet muffler that has a O.D. of about 4"? I don't wanna increase much more than that, cuz then I loose clearance.

lol ya i agree with xpndbl3, my cam is much bigger than that 254/260 and i have it ideling at 700-800rpm, never ever stalls out, play with her air bleeds, get everyting perfect and it'll run great, no stalling, no surging.. Now ur exhaust, no matter what u do it will be loud becuase u have true dual 3" pipe. I have run moroso spiral flows on mine, way too loud and now i have flowmaster 50series 2 chambers and its still very very loud. I made the same exact exhaust on my bros 82 TA except i used 2.5 tubing and its SOOOO much quieter and more tolerable, i recommecd going to 2.5 tubing and putting cutouts on the back or ur headers, save ur ear drums.

Click to Hear

yeah, it was a lot of work that i don't wanna re-do just yet. Maybe next season I will got to 2.5"

Now I might just put REAL mufflers on there and aim the turndowns out.

IIRC I had about the same size cam in my old ride, with LTs and dual 2.5" into bullets turndowned...


It's too loud for the street: I got ticketed for that setup, I pissed off my neighborhood (and I don't blame em for getting pissed), and it makes the car annoying to drive...

Mine was with a 3200rpm stall tho too...

Well mine has a T-56... So, not sure how much that will help. I will run these pipes till I get it painted and done. Then I will look into other options, like 2.5" and some flowmasters or something....

I am sorta contemplating oval pipe, and spintechs. I dunno....

i might be welding turbo mufflers onto my camaro next week since i'm sick of the noise for the street, and just run cutouts for the track...bye bye ground clearance though

yeah, that is what i am really scared of. Since this car is a pure street car.... I might see what I can do with oval.... save an inch or so, also might go a little more nuts with the flame and hammer.

ordered up my turbo mufflers today since i'm sick of the cops showing up at my house while trying to tune the camaro. we'll see how much clearance I really lose next week when they come in and I can mount them up.

An X pipe will tame it down better than a H pipe and as far as turn downs go try tack welding first and change the angle from 45 deg out to 45 deg in I have also seen some people turn the turndowns at each other to cancle the sound waves.The best thing to do is put a set of magnaflow or dynomax turbo style mufflers the ones you can see through.

the ones i have on there now u can see through... i am planning on using a more "normal" kinda muffler next time

dynamax ultraflo rounds or spintech boxed race/street mufflers. they will fit good under there and be alot quieter.

hmmm... I will look into it. I was sorta considering a stock style set up. But I think I used up the old muffler place with all my fuel set up.

What do you guys think about the muffles Y-pipe and just a straight pipe with a couple mufflers in a row and a dump facing 45* outward....

The cat-back is too expansive and I have no room. Keep that in mind and please let me know what you guys think about my idea.

As for the 1 or 2 mufflers attached after the Y, they could be anything that is relatively small. Hell I could even try the 2 bullets that I allready have, Both in a row after the Y.

Might work out OK.

if you want to sell them let me know, im looking for some TD's

a mufflex 4inch single should be enough to feed that car. i knew of one guy running deep into the 11's with a miniram 383 and mufflex 4inch with spintec muffler on the end.

if u could create that setup that would work great and not be overally loud

however, i'm not sure how well that y pipe will fit under your car. do u have subframe connectors? i think i remember someone telling me that the mufflex y pipe wont work with some sfc's. also think it wont work with some torque arm setups, and mainly the spohn piece. i'll have to recheck the thread i seen it in to be sure.

but even so, u can have a shop fab up ur exhaust to fit.

another option is to try running a long chambered tube muffler in there like i have. the 26inch long body tubes should be alot quieter than straight bullets, but fit in there just the same. they only 3.5inch outter diameter. true 3inch core. Classic Chambered Exhaust Inc. - Home Page
i have one on mine and i love it. its plenty loud when u want it to be, but quiets up on part throttle

the only other way out is to extend what u have up over the axle....and into the rear stock muffler location, using some kind of box muffler, either dual in/dual out...or two individual mufflers like spintech race box style mufflers. this would be the hardest thing to do, but it can be done. theres pics of one car in the dual exhaust picture collection with true duals over both sides of the axles.

Yeah I know there would be major problems with the mufflex piece. I know I would need to modify it to get it to fit. i have no problem with that. The good part is that then I only have 1 pipe to worry about. And I can just weld up a bunch of mufflers after it till it gets quiet enough. And a dsingle 4" dump.

i will look into that website you have shown.

Main thing is to remember that I am not racing this thing... It is just an over the top street car that has a crazy 385. I am trying to make it quiet enough to go through a drive through, LOL...

Modding the mufflex and adding on mufflers seems to be the easiest and cheapest route. I am not going over the axle and I can not put a stock style muffler in there anyways, due to my fuel delivery set up.

TD's ?? you mean spiralflow mufflers?

I think he thought you wanted to get rid of your turn downs.... dunno

oh well they're welded to the mufflers, so he'd have to buy all of it as a combo. PM me if interested I suppose.

that's not that big... I'm putting a bigger cam in my V6 cavalier.. lol

Still nice specs tho


Agreed, Aerochambers kick a$$

Ok fine, I guess it might not be huge, but when you are taking on a project for the first time in your life, have 0 experience with cars before this and have 0 friends to compare to, it is HUGE.

And on top of that, the only semi-friend I just made, that happens to own a 600 HP camaro and a 1000 HP chevelle said, "Damn, thats pretty big for an around town street car"

Thats all.

Back on topic, Are the areochambers that you guys seem to speak so highly of really quiet things down a lot? I don't mind lossing some power if I can just get this thing to shut up.

Try dynomax super turbos.

i'll post up in a few days how my summit brand turbo mufflers work out for me. the real test is if i can hear the holley blue pump over the exhaust or not, since at idle right now it drowns out the pump noise and these are NOISY pumps.

lol, that's bigger then the cam in my 355


Aerochambers are quieter than alot of mufflers but they flow very well. I have the crossflow one on my cavalier. It sounded very well behind the V6. very deep and clean. Much better than the 80 series i had on it, lol

a while back when i had a duel setup on my car i used thrush glasspacks and they made a huge difference in sound control, maybe something to try

if nothing else and you want to keep the straight through mufflers on tthe car get some that have a larger body to them. on those the body seems to extend out just a little from the diameter of the tube. if you get a larger body on teh muffler it should allow for a little better damping of the sound

do you have any pictures of how you routed the pipes around the spohn xmember?

I would suggest turning them and bringing the exits as close to the tire as possible.. that echoe from the ground has got to be massive.. your alteranative is either doubling the muffler you have... or extending exhaust till you blow outward.

or .... screw the neighbors...

truthfully, no matter how much work youdo.. they will probably not notice the differance,, and still get pissy about your sound.

This is true, about the neighbors... hehe. And if you wanna see more pics of my pipes, go to my cardomain site, 1991 Chevrolet Camaro - Dennis's Chevrolet There are more pics there. In words, I pushed the pipes up as much as possible and dimpled them, thats it. Really not that bad at all. Took a while though.

Lemme know if you still got Q's.

I will most likely add a muffler, turn the dumps and extend to the wheels. After that, screw it till I do a total overhaul of the pipes over the winter.

The 3-disk inserts-- are those from Car Chemistry? I was looking at those to quiet down my setup. Mine is very similar to yours, only with an H-pipe and no inserts. I'm using 3" Moroso Spiralflow mufflers.

Do the inserts make a difference?