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y-pipe hits subframe connector on passenger side

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Old Aug 21, 2017 | 07:56 AM
  #1  
bigchief's Avatar
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From: Long Island NY
Car: 1989 Firebird Formula
Engine: 5.7L 355 TPI
Transmission: 700 R4 with TCI rebuild kit and valve body mods
y-pipe hits subframe connector on passenger side

After installing sub-frame connectors on my 89' formula, i've had clearance issues with my y-pipe. What do you guys usually do about this? I tried modifying my y-pipe, but i didn't bend it enough and it still hits.

I'm going to buy a new y-pipe bc the current one is pretty rusty, any suggestions? I have edelbrock street legal shorty headers, and a hooker 3" catback.

Thanks!
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Old Aug 21, 2017 | 11:26 AM
  #2  
midias's Avatar
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From: Henrietta NY
Car: 1984 Trans Am L69
Engine: Sniper EFI Powered 355
Transmission: WC T5 w/ Steel Support Plate
Axle/Gears: 3.42 10 Bolt Posi
Re: y-pipe hits subframe connector on passenger side

I have dealt with this a few times. IF you go custom you can just go under it else dent the pipe a little to clear it. I have managed to fit a 3" pipe under it.
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Old Aug 21, 2017 | 02:02 PM
  #3  
bigchief's Avatar
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Joined: Jun 2004
Posts: 741
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From: Long Island NY
Car: 1989 Firebird Formula
Engine: 5.7L 355 TPI
Transmission: 700 R4 with TCI rebuild kit and valve body mods
Re: y-pipe hits subframe connector on passenger side

Well, i have the old street legal edelbrock shorty headers. which i think have 2.5" outlets. So, i would just need the y-pipe with 2.5" inlet and 3" outlet. I will probably go with the hooker y-pipe on Summit but its kinda pricey at 275ish. What do you think?

Thanks

Last edited by bigchief; Aug 21, 2017 at 02:08 PM.
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Old Aug 21, 2017 | 02:45 PM
  #4  
midias's Avatar
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Joined: Oct 2004
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From: Henrietta NY
Car: 1984 Trans Am L69
Engine: Sniper EFI Powered 355
Transmission: WC T5 w/ Steel Support Plate
Axle/Gears: 3.42 10 Bolt Posi
Re: y-pipe hits subframe connector on passenger side

You need to buy the Y pipe that matches your headers or else it wont fit
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Old Aug 23, 2017 | 01:19 PM
  #5  
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From: Kingston, ON
Car: 1985 Trans Am
Engine: 350
Transmission: T5
Re: y-pipe hits subframe connector on passenger side

A performance exhaust shop should be able to make one for you for around the same price as the Hooker Y-pipe and they will be able to make it clear the SFC. The Hooker also only has a 2.5" outlet, so it's a bit of a bottleneck.
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