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Headers and A/C

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Old May 18, 2015 | 08:14 AM
  #1  
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From: South Ms
Car: 89 Firebird
Engine: 355 TBI
Transmission: 700R4
Axle/Gears: 10 Bolt.Posi-3.73s
Headers and A/C

Ive ran headers on several of my 3rd gens before but they all had the a/c removed and the fitment was not a problem. Does the a/c cause fitment issues or is it a non-issue because I certainly want to keep my a/c in this down south heat. It does look awful tight on the passenger side with the a/c box there. What brand headers have some of you guys used that fit really well with your a/c in place? Im looking hard at the Hooker Shortys and matching Y-Pipe id just like some of you guys opinions on this before I pull that trigger. Thanks
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Old May 18, 2015 | 10:38 AM
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Car: 89 Firebird
Engine: 355 TBI
Transmission: 700R4
Axle/Gears: 10 Bolt.Posi-3.73s
Re: Headers and A/C

...
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Old May 18, 2015 | 12:32 PM
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From: Waldron Arkansas
Car: 1986 IROC Z28
Engine: Carburated small block 454
Transmission: Level 3 Raptor 700R4 2600 stall
Axle/Gears: Strange S60 3:73 S Trac Posi
Re: Headers and A/C

I'm about to do this very project in a few weeks on my '86 IROC, if your car is like my older IROC (compressor on the driver's side/non serpentine), the only fitment issue is on the driver's side, where you will need to remove and trim one of the A/C Brackets. The one that requires trimming is the small one, behind and below the compressor, that bolts directly to the #1 exhaust port bolts. Here is a pic of how it needs trimmed................



Last edited by MSgt Luttrell; May 18, 2015 at 12:40 PM.
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Old May 18, 2015 | 12:41 PM
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dmccain's Avatar
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From: South Ms
Car: 89 Firebird
Engine: 355 TBI
Transmission: 700R4
Axle/Gears: 10 Bolt.Posi-3.73s
Re: Headers and A/C

My a/c is on the passenger side.
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Old May 18, 2015 | 01:32 PM
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Car: '86 Iroc Z & '91 RS
Engine: 305 TPI & 305 Qjet - Future LC9
Transmission: 700R4
Axle/Gears: 3.23
Re: Headers and A/C

on my 91 it's a non issue... running headman 68470
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Old May 18, 2015 | 02:01 PM
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From: South Ms
Car: 89 Firebird
Engine: 355 TBI
Transmission: 700R4
Axle/Gears: 10 Bolt.Posi-3.73s
Re: Headers and A/C

Originally Posted by Camaro86IrocZ
on my 91 it's a non issue... running headman 68470
Do the hedmans have the o2 sensor bung?
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Old May 18, 2015 | 05:34 PM
  #7  
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Car: '86 Iroc Z & '91 RS
Engine: 305 TPI & 305 Qjet - Future LC9
Transmission: 700R4
Axle/Gears: 3.23
Re: Headers and A/C

Originally Posted by dmccain
Do the hedmans have the o2 sensor bung?

Mine do... But I did get them with the car when I bought this project... So not 100% sure if they came that way out of the box...
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Old May 18, 2015 | 05:49 PM
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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: Headers and A/C

I have these...

PM me for details
Attached Thumbnails Headers and A/C-dcp_1340.jpg  
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