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Best headers for the dual cat set up?

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Old Jan 23, 2011 | 09:51 PM
  #1  
Pat1990GTA's Avatar
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From: Canada
Car: 1990 Trans Am GTA
Engine: 383 HSR Profiler heads
Transmission: 700R4
Best headers for the dual cat set up?

I want to get a set of headers for my 90 trans am but with the dual cat set up its seems they are hard to find. The previous owner installed a very nice high flow stainless cat set up so i would like to keep them. I see Edelbrock makes a set, but does anyone know or tried any other ones?

Thanks!
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Old Jan 23, 2011 | 10:46 PM
  #2  
Dyno Don's Avatar
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From: Orange, CA
Car: '90 Trans Am-12.45@110.71
Engine: 355 w/AFR 195's Elem. 400/430 HP/TQ
Transmission: Tremec T-56
Axle/Gears: 12 Bolt 3.73
Re: Best headers for the dual cat set up?

How about these?

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Old Jan 23, 2011 | 11:30 PM
  #3  
GTA Ryan's Avatar
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Joined: Jan 2009
Posts: 13
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From: Boise
Car: 1990 Pontiac Trans Am GTA
Engine: L98
Transmission: 700R4
Re: Best headers for the dual cat set up?

^^^^^ What kind of headers are those?
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Old Jan 24, 2011 | 04:37 PM
  #4  
Pat1990GTA's Avatar
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From: Canada
Car: 1990 Trans Am GTA
Engine: 383 HSR Profiler heads
Transmission: 700R4
Re: Best headers for the dual cat set up?

[quote=Dyno Don;4798773]How about these?

Wow nice! Where can i get a set?
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Old Jan 24, 2011 | 10:06 PM
  #5  
KiLLJ0Y's Avatar
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From: Pleasant Grove, Utah
Car: 1993 GMC Typhoon
Engine: 4.3 Turbo
Transmission: 4L60
Axle/Gears: 3.42
Re: Best headers for the dual cat set up?

you get them from "the man" himself... he who posted those.. "Dyno Don". the only 1 3/4" headers on the market, with ball and socket 3" flanges, 2 1/2" dual pipe. Send him a PM.
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Old Jan 24, 2011 | 10:27 PM
  #6  
Dyno Don's Avatar
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Joined: Mar 2000
Posts: 5,703
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From: Orange, CA
Car: '90 Trans Am-12.45@110.71
Engine: 355 w/AFR 195's Elem. 400/430 HP/TQ
Transmission: Tremec T-56
Axle/Gears: 12 Bolt 3.73
Re: Best headers for the dual cat set up?

[QUOTE=Pat1990GTA;4799682]
Originally Posted by Dyno Don
How about these?

Wow nice! Where can i get a set?
Here.....

www.top-downsolutions.com
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Old Jan 24, 2011 | 10:38 PM
  #7  
1989GTATransAm's Avatar
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From: Cypress, California
Car: 1989 GTA
Engine: 369 TPI
Transmission: 4L60E
Axle/Gears: 3.70 Nine Bolt
Re: Best headers for the dual cat set up?

Just a heads up but at the last dyno session there were cars in the 390rwhp mark using Dyno Dons headers. I expect to see over 400rwhp this year.
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Old Jan 25, 2011 | 07:36 AM
  #8  
The Project's Avatar
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From: West of Toronto
Car: 89 IROC
Engine: 305 TPI / ZZ4 cam
Transmission: Stage 2 700R4, LS1 driveshaft
Axle/Gears: Strange 3.42 w/ Auburn
Re: Best headers for the dual cat set up?

I run Edelbrock headers with dual cats and a 3" SLP exhaust. Works great so far.

Dyno Don headers have great reviews here...will add them when I swap the cam and heads.
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Old Jan 30, 2011 | 07:55 AM
  #9  
lthrneck's Avatar
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Posts: 148
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From: San Angelo, Texas
Car: 89 Iroc
Engine: 350
Transmission: T56
Axle/Gears: 3.70 9bolt
Re: Best headers for the dual cat set up?

One more vote for Don's headers. Quality is top notch and everyone that looks over my car is amazed that I found a set with the 1 3/4" runners. No numbers yet but with my HSR, Don's headers, T-56 and 370 gears on a stock motor its hard to keep it planted and straight until i hit 3rd in street tires.
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Old Feb 5, 2011 | 07:02 PM
  #10  
ninetyone's Avatar
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From: Delaware
Car: 91' Firebird SOLD
Engine: 350 TPI +bolt-ons
Transmission: 700r4
Axle/Gears: 3:42
Re: Best headers for the dual cat set up?

Edelbrock TES dual ypipe headers. They make some for single ypipe too.
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Old Jul 18, 2011 | 07:11 PM
  #11  
Bill Capone's Avatar
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Joined: May 2011
Posts: 29
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From: Hasbrouck Heights NJ
Car: 1991 GTA 30k miles
Engine: L98 with Dyno Don's headers
Transmission: 700R4
Axle/Gears: 3.23:1
Re: Best headers for the dual cat set up?

That photo looks good
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