Over or Under axle
Thread Starter
On The Tree
Joined: Mar 2008
Posts: 115
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From: Claflin, KS
Over or Under axle I got some long tubes for christmas and I really want to get the ball rolling on my full exhaust. I am going with a custom true dual setup hoping they can tuck it up nicely. I am wondering which way to go. Over axle or under the axle? Is it worth saving the money and going under the axle and losing some ground clearance? Or is it worth spending the dollars on going over the axle with some better clearance? I figured I would get a quicker response here than posting in the true dual sticky.
Better clearence is always nice, plus it will be easier over the axle for jacking the rear end up. If you do under, make sure its tucked as nice as possile, and also put flanges somewhere along the way so you can un bolt the back of the exhaust past the x pipe if you need to pull the rear or jack it high up or something.
Over
Under screams half-assed job. When you bottom out the under style (you will) on a sharp dip, you will then bang against the axle with the rebound of the suspension
God forbid you ever decide to lower the car
Rule of thumb: Over for solid axles. Under or through for IRS
Under screams half-assed job. When you bottom out the under style (you will) on a sharp dip, you will then bang against the axle with the rebound of the suspension
God forbid you ever decide to lower the car
Rule of thumb: Over for solid axles. Under or through for IRS
i'm lowered and my 3" pipes go under, i'd rather have it this way. it doens't look halfassed if you have someone do it who knows how to do it. if i were to do anything over the axle it'd be a stock cat-back.
rule of thumb, more air in more air out the more HP and TQ you'll get . . . plus it just sounds different. i was next to my buddy who had the same mods as me when i had lt's. we both had 3" true duals, difference was mine went under the axle and his came next to eachother and went over the axle . . . we couldn't hear his car and he could actually hear my car inside of his while he was driving in front of me.
rule of thumb, more air in more air out the more HP and TQ you'll get . . . plus it just sounds different. i was next to my buddy who had the same mods as me when i had lt's. we both had 3" true duals, difference was mine went under the axle and his came next to eachother and went over the axle . . . we couldn't hear his car and he could actually hear my car inside of his while he was driving in front of me.
why not go with a cat back and a cut out? if true duals is what your set on they might charge alot more bc the will beat the hell out of the floor pan thats what kept me from going true duals i was running open cut outs and next to a guy with td's on a camaro and mine was louder for sure
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why not go with a cat back and a cut out? if true duals is what your set on they might charge alot more bc the will beat the hell out of the floor pan thats what kept me from going true duals i was running open cut outs and next to a guy with td's on a camaro and mine was louder for sure
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It's not necessarily expensive.
I did TDs over the axle and it was only $470.
3" x-pipe, 2.5 after. I supplied everything, but the piping (not including x).
I scrape mine sometimes, but it's because it's a little lower than it should be (the exhaust not the car), haven't gotten it fixed yet (that's on steep driveway/parking lot declines).
Teching In
Joined: Nov 2006
Posts: 48
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From: SGV/IE SoCal
Over doesn't have to be expensive. I had mine done over the axle for $300
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WHIPPLE Superchargers, Procharger, Magnuson, Powerbond Sale, HPTuners packages!, Trickflow, AFR, PRC, CHE Trunion upgrade, $100 7.400" pushrod set, Custom Cam of your choice
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From: Miami, Fl. - Hurricane Highway
I had mine done under the axle, and I do not regret it at all. I can't lower my car anyways, because of the damn SLP LT's. Either way I love how it looks especially with some Ebay tips with 3" inlet/ 4" dual outlets (piping is 3" all the way back, and under). I had 1 time that I scraped, and it was because I had a passenger. And it wasn't even from going under the axle, it was one of my SLP Shotgun resonators. I was on the highway, and there was a slight dip. So when the weight of the car came down it scraped slightly on the resonator. I've recently taken off the resonators, and put back my Sweet Thunder Chambered mufflers. So I have actually gained some clearance in that area of the exhaust system.
Either way I feel you can't go wrong with either direction you want to go. Depending where you take the car going over might be more expensive than other places. In South Fl. everything is expensive, and there was only 1 place I knew of that would do it mandrel bent. Again though I do not regret going under, make sure to post pics when your done.
-Joel
Either way I feel you can't go wrong with either direction you want to go. Depending where you take the car going over might be more expensive than other places. In South Fl. everything is expensive, and there was only 1 place I knew of that would do it mandrel bent. Again though I do not regret going under, make sure to post pics when your done.
-Joel