built a custom 2.5" mandrel bent exhaust in my friend's driveway
 

I finally got a 2.5" mandrel bent exhaust on my car....

The materials:
2 mandrel u-bends
3 exhaust hangers
1 6" flex pipe
8ft straight pipe
2 2.5" 3 bolt flanges
[already had the Techtonics Tuning HFC]
Total Cost (not including cat): $130
(plus a 3" exhaust tip left over from my friend jerd's exhaust)

Originally the plan was to make a new downpipe off of the cat, and then the rest of the exhaust after a flex pipe and another flange to take it off in 3 pieces from the turbo back. We decided Audi was stupid in making the cat/downpipe connection in the hardest spot to reach (which, according to jerd, is why audi mechanics get paid so much)... so we chopped the flange off of my month old cat and welded up a real one piece cat/downpipe, moving the flange down to a reasonable level.
http://khphotography3.com/photos/764411116_JLSFV-L.jpg
After the downpipe there is a 6" flex pipe, then a 4ft straight pipe... and then jerd worked his magic in the rear end and routed the exhaust around the rear diff and out the back, which let us center it perfectly.
http://khphotography3.com/photos/764410877_xUdpa-XL.jpg
When I had the turndown off of my stock 2.25" downpipe, I measured 95dB under load in the driver seat. Now I'm getting 88dB under the same conditions. (on an iPhone SPL meter, not accurate but it's consistent)

The car has less of a boost spike around 3k now, but if feels like it has more power throughout the rpm range. THANKS JERD!



pics:
http://khphotography3.com/photos/764692378_RBN39-L.jpg
http://khphotography3.com/photos/764693655_CZTDF-L.jpg

video:
http://vimeo.com/8745582

97dB max during the video at 35ft. I think california's limit is something like 95dB at 50 ft, and the SCCA limit is 93dB @ 50ft, so I may need a muffler at some point. I love the sound though.

sounds like its farting

sounds like sex.. i want..

win. you should put a magnaflow on it for a more ballsy growl. am i crazy or are your tails a little different in color?

good work and nice shots, I agree with putting a different muffler on it

I want a white car :(

Me to...


But hey pyropenguin, Ill pay if your willing to make another one of these setups. I live about 1 hr 30 min away

Wait, thats a high flow cat!?

Then what is this? I thought what I tore out of my car was the stock cat! It looks identical to yours.
Attachment 40712

They're the prefacelift updated tails. Not the crappy 95-98 lights, but not the new 99.5+ lights.

different muffler? There is no muffler :cool:

I'm actually up in Redding, CA right now for christmas, it's a friend up here who did the welding for me. I told another guy on Audizine that I'll try and find someone willing to do some welding in SD and make some down there... or maybe i can get my friend from Redding to drive down for a weekend and fab up some exhausts for cheap.

Yeah, you threw away a ~$230 Techtonics Tuning High Flow cat. LOL. I actually picked that one because it looked the closest to stock.

Let me know :)

hey now i happen to like my "crappy" tail lights, i like them better than the other ones actually