Audi A4 Testpipe Install Nightmare

[S-lime]

How the hell do I get the stock catalytic converter out of there? I removed the airbox and both O2 sensors. I removed the downpipe from the main exhaust, and I unbolted the stock cat from the engine. So now I have the cat and the downpipe lose. I tried for hours to get it out. Tried removing it through the bottom of the car downpipe first, cat is too big to fit through. Tried removing it through the engine bay catalytic converter first, and can't get it out that way either. There's no way I'm getting the downpipe unbolted from the cat in there either. What now?

[BaseDrifter]

Remove the front passenger wheel and unbolt the DP from cat. With both ends loose it should be able to rotate enough to get to the tricky bolt.

[MarcRogers]

I've got the cat out through the bottom it's kinda a bitch but I did have the downpipe unbolted from the cat


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[Cybersombosis]

To get it out from the top you have to rotate it as you pull it out. I remember scratching my head until it suddenly came out. I put it back in the same way.

Doug

[quattrosnrabbit]

Need to separate the down pipe. Dremel off the nuts/bolts if you have too. I've had to pull the passenger axle and axle shield before to get working room. If you have oxy acetylene, cut them off etc. Use whatever tools you have to get the job done. Downpipe doesn't have to come out normally. Cat alone from the top.

[volkswagensRus]

Remove the front passenger wheel and unbolt the DP from cat. With both ends loose it should be able to rotate enough to get to the tricky bolt.

Way easier to take it out of the bottom, if you have the means.

[A1 A2 German]

I was going to (may still) make a thread for an easy how too.

The pita is using 3' of extensions to access the cat/test pipe to dp nuts. Forget that, simply take an angle grinder and cut out your welded in flex pipe and trash it. Buy a stainless steel 12" slip on flex pipe like this: http://www.google.com/search?q=12%22..._ntEmBlf2pM%3A. Why? This simply will pull off in 30 seconds and you can pull your entire test pipe and dp as one, once reinstalling slip this back on to complete the system and all that's left is the three ~15mm kkk bolts. Talk about cake.

[Davdraco1]

Take the passenger side trans mount/bracket off. This will require remove of front passenger wheel, also take the passenger axle heat shield off. I did all this when I did my clutch job. I reinstalled the cat and downpipe before I put the mount and heat shield back in. Slid right in. Getting the bracket back on the trans is tricky but doable. Good luck.

[volkswagensRus]

I was going to (may still) make a thread for an easy how too.

The pita is using 3' of extensions to access the cat/test pipe to dp nuts. Forget that, simply take an angle grinder and cut out your welded in flex pipe and trash it. Buy a stainless steel 12" slip on flex pipe like this: http://www.google.com/search?q=12%22..._ntEmBlf2pM%3A. Why? This simply will pull off in 30 seconds and you can pull your entire test pipe and dp as one, once reinstalling slip this back on to complete the system and all that's left is the three ~15mm kkk bolts. Talk about cake.

Agreed for the most part. For two reasons. 1) The stock tubing from manifold to the first flex pipe is TINY. Eradicate the stock DP+cat and tubing up to the first flex pipe, and you'll have a 2.2" OD factory exhaust. 2) It's a PITA getting the piping off up to the first flex pipe. Just cut that junk out. But keep the stock flex if its in good shape.

[b5a4erik]

When I did mine (99 aeb 1.8t fwd) I just removed the 6 total bolts, 3 at the top, 3 at the bottom of the cat, and it came out pretty easy. Now that I think about it, I just might've had my exhaust manifold and all that heat shielding removed at the same time as well. Perhaps a lotta extra work, but hope this helps.

- ea

[tar]

Pulling mine for clutch its a bitch. Just ordered vband flanges so future will be easier(i hope) I'm borla and went out The top with alot of other stuff off axles/shields ect. So ready to have a lift in garage(3 months away)