Magnaflow Cat Back install problems...

[gmags]

i installed a stainless Magnaflow cat back on my 88 GT. I can't get a good seal where the pipes attach to the stock H pipe! I've tried re-tightening the nuts several times, but i still have some small leaks there. Anyone else have a problem like this? The kit is my opinion is difficult to install, (3 pipes and a muffler per side), i wish i had went with Flows! I've installed 2 flowmaster cat backs w/o any problems like this...

 

[TwinTurbo93]

I have never had a problem with a ball-and-socket type flange on any exhaust... if you need to have the flowtubes and everything else welded up, take it to an exhaust shop to get that done and see if it helps, they should be able to get rid of it for you, more than likely its the u-bolt clamps leaking, not the flange, or maybe the flow tubes don't align correctly with the h-pipe?

 

[gmags]

i did have a heck of time getting each side totally lined up and hung! compared to a flowmaster system, this one was difficult to install...it took me more than 5 hours! granted i was working in my driveway, but it's nothing i haven't done before. i also never had a problem with the ball/socket connection at the end of the H pipe (both stock and off road). I'm dead set against welding the H pipe to anything! i'd buy a flowmaster system before that. this paticular car still had a ford factory exhaust system on it before this. i wish i never installed the magnaflow system! i definately will not reccomend magnaflow to anyone. it's too late to revert back now 'cuz i had to cut the factory exhaust off..

 

[TattooMatt]

i installed a stainless Magnaflow cat back on my 88 GT. I can't get a good seal where the pipes attach to the stock H pipe! I've tried re-tightening the nuts several times, but i still have some small leaks there. Anyone else have a problem like this? The kit is my opinion is difficult to install, (3 pipes and a muffler per side), i wish i had went with Flows! I've installed 2 flowmaster cat backs w/o any problems like this...

I installed one too. I had to have the flow tubes shortened a tad. No biggie. I took it to a muffler shop after I installed it and they welded it and adjusted everything for about 50bucks. No leaks!

 

[MahFiVeOh]

No probs with mine

 

[gmags]

i was just under the car and i think i see what my problem is...
the two flanges are actually touching, preventing the complete seal. i must admit that the magnaflow flange is super thick! i'll probably break the studs before i get the whole thing tight. i guess my next step will be to wrestle the pipe off, and try to grind the edges of the flange down a bit where they are touching, and then see if i can get a good seal. the leaks are minor, but i know that they are there! i can feel the exhaust escaping there. i really only hear the leaks when its completly cold, or like when you go to the fast food drive thru where the sound can bounce back off the building...

 

[TIMMY2734]

mine fit fine and is leak free for about 2 years. Took about an hour TOPS to put it in

 

[gmags]

while wrestling with the flow tubes yesterday in the driveway, it started pouring down rain. i didn't have them off yet, so i bit the bullet and took the car to my favorite meinike in bricktown. they cut the flanges off, and put some different ones on (cost me $60).....no leaks! sounds great now! not much louder than stock at idle, nice & loud when i get on it...