2000SLVR_Z28

When I put my hooker headers on, I am having a custom y-pipe made. The bad thing is it wont be mandrel bent though. The guy at the exhaust shop said it will probably have some creases in some spots. Any idea if this will hurt the performance?

AlonzoVersion 1.0

[quote]Originally posted by 2000SLVR_Z28:
<strong>When I put my hooker headers on, I am having a custom y-pipe made. The bad thing is it wont be mandrel bent though. The guy at the exhaust shop said it will probably have some creases in some spots. Any idea if this will hurt the performance?</strong><hr></blockquote>It will by how much I dont know?I would guess it would depend on the crease's size.Do you mean they are going to fold your y-pipe by some what.If so it will slow down the out going air which will affect performance.

Colonel

Use one size bigger tubing and there will be practically no performance lose.

2000SLVR_Z28

[quote]Originally posted by Black Sunshine/ 00SS:
<strong>He should be able to get it done without a crinkle, but with "crushed" areas. A 3" pipe crushed, I dont think you are going to loose enough to worry about, should be good up to 600 hp, and even then, the gain with a mandrel would be minimal.</strong><hr></blockquote>

Actually I'm going to use 2.5" pipe. Will that hurt me, or should I do as the colonel said and have him use 3"? I'm just concerned about clearance with the 3" pipe.

BLUEBYU

iTrader: (1)

Lol! Did the same set-up you are attempting. My exhaust guy did the bends with a 2.5" and turned out great. The "crush" areas were minimal and believe me they are much better than the stock system. Do use the Random Tech bullet cats for an awesome sound( btw, I do have the Loudmouth). Have your guy make flanges to connect to the headers and weld all connections including to the cats. The merge to the 3" collector at the LM, have him cut the two 2.5" pipes to form a y-shape and weld the seams and connection to the collector. I did consider the 3" y-pipe as mentioned and glad I did not because I do scrape occasionally on the driver's side with the 2.5" set-up. OBTW, this mod with the hooker headers will give you the most bang for the buck....especially torque and response. Good Luck! Randy <img src="gr_stretch.gif" border="0">

01 SS Jay

Don't sweat it. Most muffler shops wont have mandrel bending ability anyway.

VINCE

iTrader: (1)

After going back and forth with putting and taking cats off I am in the same boat.. I have a crinkle in my 2.5" Mac Y-pipe.. I am thinking about buying another y-pipe or just upgrading to better headers and y-pipe if it is worth it..

Black Sunshine/ 00SS

iTrader: (1)

He should be able to get it done without a crinkle, but with "crushed" areas. A 3" pipe crushed, I dont think you are going to loose enough to worry about, should be good up to 600 hp, and even then, the gain with a mandrel would be minimal.