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Author Topic:   Exhaust routing for y-pipe
Dirt Full Roller

Total posts: 70
posted January 24, 2005 09:56 AM  
I am planning on running a y-pipe this year. 2 1/2" primaries going into a collecter with 3 1/2" going out. Anybody have any experiences with running this underneath the car? I run a '77 Monte and the floorpan and everything has to remain in place. I don't think my rules would allow me to run anything over the tranny and through the firewall or anything like that. I'm assuming people have done this but I am just curious if anyone has suggestions. Right now I just have a seperate pipe off the manifold on each side and there is no problems with space but I'm worried about how to fit the y-pipe under there with the collector and 3 1/2" pipe without bottoming out on a rough track.

[This message has been edited by Speedracer92 (edited January 24, 2005).]

Dirt Maniac

Total posts: 167
posted January 24, 2005 10:29 AM  
run left bank under tranny at torque conveter (good place to put some insulating tape also) connect the two on rhs of tranny put muffler back behind rear floor pan before rear end, if rules call for one

Dirt Maniac

Total posts: 193
posted January 24, 2005 10:39 AM  
We did that this year. Ran the drivers side pipe under the engine right by the engines crossmember & ran a larger 3 in. pipe with a turndown that ended alittle past the tranny crossmember.

We used a splitter pipe like the guys use that take off their mufflers on 90s pickups so they can run 2 pipes out the back.

We also seem to have plenty of room where the factory put the cataletic converter. Our car is an '84 Cutlass.

it did change the sound of the car.

It ran a top RPM of 6400 but we tried to keep it around 6000 for max performance on most nights. The 6400 came from a gear change at the end of the year.

Dirt Freak

Total posts: 344
posted January 24, 2005 11:56 AM  
We ran a y pipe combo with 2.5 down pipes with a 4 inch collector.It crossed over under the converter and ended just ahead of the rear traling arm.But we are allowed to raise the floorboards level with the tunnel on the RS.

[This message has been edited by Speedway65 (edited January 24, 2005).]

Dirt Full Roller

Total posts: 70
posted January 24, 2005 12:59 PM  
thanks guys! i don't have to run a muffler so maybe it won't be as big of an issue as i thought it would be.

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