3" crush bent exhaust on VQ30?

*skuccio's max* · 10-05-2009, 09:53 AM

Would it be worth it over a 2.5" crush bent system? The butt dyno noted a much stronger low-mid range pull going from stock to 2.5". People are making more power with 3.0" exhausts on stock H22s (2.2L 200HP motors) over 2.5" exhausts. I figure the VQ could only use more help. I'd prob couple it with a custom Y-pipe. Worth it or not? I think they would cost the same for me.

**Kevlo911** · 10-05-2009, 10:00 AM

A 3" crush bent exhaust > 2.5 Crush bent on a modded VQ.

*DrunkieTheBear* · 10-05-2009, 10:10 AM

+1

Look for a mandrel bender tho

*skuccio's max* · 10-06-2009, 08:13 AM

Sweet so that is that then. I knew the VQ35 dudes were making nice power with the 3" pipes so yea this makes sense.

kzoosho · 10-06-2009, 10:39 AM

I picked up 35 hp when i went to a 3 inch turbo back from 2.5 . iknow thats not n/a but still showed gains.

throttlehappy46 · 10-07-2009, 09:48 AM

2.5" to 3" megaphone off the back of the Y pipe collector will make you smile or just fit a 3" system at the first flange which should still give a decent gain.

Should be no problems with a crush bent system f you not chasing every horse.

ray_289 · 10-25-2009, 08:31 AM

so if i had a 3" starting right after the y-pipe i would notice a difference?

krazy6 · 10-25-2009, 10:14 PM

If you can't find someone with a mandrel bender (very likely) just buy some 3" bends off summit or jegs. Then take them to an exhaust shop and have the guy cut and weld everything up.

*skuccio's max* · 10-26-2009, 07:25 AM

Quote:

Originally Posted by krazy6

If you can't find someone with a mandrel bender (very likely) just buy some 3" bends off summit or jegs. Then take them to an exhaust shop and have the guy cut and weld everything up.

Meh I think crush bending will be good enough.

*accordingtou* · 10-26-2009, 01:32 PM

Quote:

Originally Posted by ray_289

so if i had a 3" starting right after the y-pipe i would notice a difference?

Yes

krazy6 · 10-26-2009, 09:41 PM

Quote:

Originally Posted by skuccio's max

Meh I think crush bending will be good enough.

Whatever floats your boat!

throttlehappy46 · 10-27-2009, 01:41 AM

3" bends with cutting and welding still introduces a lot of turbulence, as the welding protusions inside the pipe etc along with the extra labor charge for the effort of welding it up makes it a questionable 'gain' over crush bent for the price. Especially on a N/A car

krazy6 · 11-03-2009, 03:15 PM

Quote:

Originally Posted by throttlehappy46

3" bends with cutting and welding still introduces a lot of turbulence, as the welding protusions inside the pipe etc along with the extra labor charge for the effort of welding it up makes it a questionable 'gain' over crush bent for the price. Especially on a N/A car

My guy charged me $150 to weld up the exhaust. Seems pretty reasonable to me.