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Old Dec 30, 2001 | 02:24 AM
  #1  
HM Murdock's Avatar
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From: Justin, Texas, USA
Car: 1988 Formula and 1995 LT4 Z28
Engine: 305 TPI and 361 LT4
Transmission: M5 and stalled A4
Header question...

Will any shorties bolt/weld up to the stock ypipe on my dual cat 305?
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Old Dec 30, 2001 | 02:36 PM
  #2  
Mark A Shields's Avatar
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From: Someone owes me 10,000 posts
Car: 99 Formula
Engine: LS1
Transmission: T56
Axle/Gears: 342
None that I know of, that's why you have to buy a y-pipe.
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Old Dec 30, 2001 | 02:39 PM
  #3  
HM Murdock's Avatar
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From: Justin, Texas, USA
Car: 1988 Formula and 1995 LT4 Z28
Engine: 305 TPI and 361 LT4
Transmission: M5 and stalled A4
Well, anyone make prefabbed ypipes for dual cat cars?
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Old Dec 31, 2001 | 02:30 AM
  #4  
HM Murdock's Avatar
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From: Justin, Texas, USA
Car: 1988 Formula and 1995 LT4 Z28
Engine: 305 TPI and 361 LT4
Transmission: M5 and stalled A4
Or can they make one before I do an install of headers, since it is 12 miles from my place to the nearest exhaust shop...
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Old Dec 31, 2001 | 10:38 AM
  #5  
Phil87IROC's Avatar
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From: Tucson, Arizona
Car: 1987 IROC Z28
Engine: 6.0L LQ9 crate engine
Transmission: Performa Built 700R4
Axle/Gears: 3.42 10 bolt, Eaton/Moser
It's best to have one fabricated at the exhaust shop for this dual cat setup. It will fit the best and perform well.

Don't be shy to drive the car with open headers or exhaust to a muffler shop, that's normal. If a cop hassles you just explain where you are going. I've done this many times and never been pulled over. Just drive very slow if you can, safely.

BTW, the car quiets down in your OD gear quite a bit.

Just my .02 cents worth.........
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Old Dec 31, 2001 | 04:55 PM
  #6  
HM Murdock's Avatar
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From: Justin, Texas, USA
Car: 1988 Formula and 1995 LT4 Z28
Engine: 305 TPI and 361 LT4
Transmission: M5 and stalled A4
That makes sense...Thanks...
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Old Jan 1, 2002 | 05:45 PM
  #7  
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From: Morrison, Colorado
Car: 1986 IROC-Z
Engine: 355 ci TPI, 10:1 cr, Isky cam, ported heads, dual exhaust
Transmission: 700R4, ratchetting shifter, 3.23 rear
Driving on open headers...

Be careful driving with open headers on a cold day. Unless it's warmer than 50 degrees outside, you stand a good chance of warping your exhaust valves.
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Old Jan 1, 2002 | 06:17 PM
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From: Madison, WI
Yeah, most muffler places can fab you a y pipe, but like he said, be really careful driving with open headers. You'll want to secure all wires to be very far away from the headers. They are quite a bit hotter than your stock exhaust manifolds, and will burn through your spark plug wires, your temp. sensor units' wires, etc.

Jon
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