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Just wrapped this up. Had a single 3 before with a spintech crossflow. I decided to step up to 4 inch but wanted to stay with dual tailpipes, I wanted to go with a more strailth through muffler, so I had to get creative. Coming off a set of 2210s. Factory ride hieght. I only wrapped it to help with heat control.
Yes......now that’s a proper exhaust! The turn after the muffler is a little tight but still should flow very well. Great job!
It looks worse in the pic than it is. Its all smooth with a proper splitter in the Y. I couldnt find a single 4 to dual 3 splitter. Especially in the space confines
I always enjoy seeing how others do their exhaust. How much clearance do you have over the axle between the axle and exhaust and body and exhaust? Are you using a panhard bar lowering bracket to gain clearance?
Please excuse the leftover never seize. Still a work in progress
Originally Posted by Tibo
I always enjoy seeing how others do their exhaust. How much clearance do you have over the axle between the axle and exhaust and body and exhaust? Are you using a panhard bar lowering bracket to gain clearance?
Tons of room between axle and pipe. Its super close to the body on the passenger side of the pipe. It doesnt touch or vibrate though. Ive yet to hear it bangin around on these fine northeast roads. Yes, I used a panhard brace drop bracket.
Way better clearance than my 4" mufflex system. I've relocated my torque arm to the trans crossmember though, which is part of the problem. Still, looks very nice. If you've got a decent microphone, you should let us know how it sounds. What muffler are you running? My Spintech sounds okay (if not a little loud, but I'm sure that has more to do with the 4" sewer pipe) but it's a huge restriction. I had to cinch my over the axle pipe down with all of my might or it'd blow off due to the pressure. I've been trying to find a decent straight through that'll fit nicely.
Way better clearance than my 4" mufflex system. I've relocated my torque arm to the trans crossmember though, which is part of the problem. Still, looks very nice. If you've got a decent microphone, you should let us know how it sounds. What muffler are you running? My Spintech sounds okay (if not a little loud, but I'm sure that has more to do with the 4" sewer pipe) but it's a huge restriction. I had to cinch my over the axle pipe down with all of my might or it'd blow off due to the pressure. I've been trying to find a decent straight through that'll fit nicely.
It’s a dynatech split flow. Sound will raise the hair on your neck. My phone takes a good sound. But this is as close to social media as I’m getting. I put the spintech that was on it on my ls1 car, I’m gonna swap it with an aero chamber cause doesn’t sound “right” on that. I’m gonna tie the torque arm to the subframe connectors. The cross bar should fall right under the high spot before the merge collector
I'll put it out there also, I'd love to hear what this sounds like, even on an LO3, I've never heard one of the dynatech mufflers. For that matter, I know I love the 3" aerochambers but I've never heard a 4"...
I think you can post videos directly to here now, but if you don't have anywhere to post them you can send them to me and I'll put them up for you.
Just a bit of an update. Swapped to a t56 (thanks scooter) ended up makin mu own crossmember, redoin the y-pipe and usin a modded midwest chassis torque arm. Probly do a full build thread once the blower is on. Lost a little clearance. Trans is massive. Sittin on a pro-kit now too
I know this is an old thread. Could you post a list of the bends you used? Looking to diy a 4” and I’m trying to figure out the bend radius’s needed.
If youre asking that question then a 4" exhaust might be more than you can do. What he did, you can't buy off the shelf. And the list of lengths and bends will only be right for a car with his exact parts. The exhaust routing has to contend with the headers, torque arm, SFCs, ride height, panhard bar and transmission Xmember.
I have and plan to do most of those things. I’m a collision repair tech by trade. I’m sure I can handle the labor. If I had a build sheet of his bends and radiuses. It would help. Don’t need a y pipe. Just from the cat back. The sinister kit just seems really expensive for its type of materails. If it were stainless it would add up tho. Likely going to be the path I take. Not sure yet tho.
I’ve got to put a fuel pump and sending uint asm in. I’m going to prep the rear end with a 9 bolt disc brake unit. Drop exhaust so I figure it’s a good time to do it all. Also have all new rear suspension. Getting tired of my gas gauge changing from full to empty and I speed up. Only things I’m lacking are getting exhaust and power coating the calipers.
Way better clearance than my 4" mufflex system. I've relocated my torque arm to the trans crossmember though, which is part of the problem. Still, looks very nice. If you've got a decent microphone, you should let us know how it sounds. What muffler are you running? My Spintech sounds okay (if not a little loud, but I'm sure that has more to do with the 4" sewer pipe) but it's a huge restriction. I had to cinch my over the axle pipe down with all of my might or it'd blow off due to the pressure. I've been trying to find a decent straight through that'll fit nicely.
Super old post but if you're still looking for drop in perforated core muffler that fits very nicely with the mufflex cat back definitely try the vibrant 1139
I did something similar. Homemade copy of a mufflex exhaust. Hacked up with my horrible welding skills, but works great haha.
I'm actually looking to do the reverse of that to a degree.. 3.5" downpipe off the turbo, I'd like to run 3.5" up to the axle, then use the flowmaster WYE to split into a pair of 2.5" pipes and run small bullet mufflers.
Sorta-kinda like the holley "trual dual" kit from the axle back.
I think twin 2.5" mufflers will quiet it down and still flow enough to support the turbo.
09-01-2019, 12:18 AM
what the hay!! - sewer pipes! wow! how loud is this thing? 
