Performance Exhaust Header

Your factory exhaust manifold is restricting both your 1985 GMC K3500 sound and power. By upgrading to Performance Exhaust Headers, your making it easier for your engine to push exhaust gasses out of the manifold. With your performance exhaust manifold, each cylinder will get its own exhaust pipe, rather than sharing a common manifold. This will help you gain more horsepower and torque. Another added benefit to headers is you will increase the sound you crave.

Depending on your vehicle, and your intended use there are different headers you can go with. We carry a large inventory from leading manufacturers, which will include both short tube headers and long tube headers. Long tube headers like the name states, are much longer than short tube headers. They merge further out which results in even less backpressure. Long tube headers are ideal for high-rev vehicles, and racing. They build most power in the mid to high RPM range. These headers can also be difficult to install, or require some more work due to needing more space for the long tubes. Alternatively short tube headers merge in a shorter distance and are ideal for low-RPM power. For daily drivers and towing, these will build power the most power from idle to mid range. If you have any questions about what headers are best for you reach out to one of our experienced representatives and we will help you make a more informative decision.
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HEDMAN 69120
Please Note:

Some images might not represent the actual product

HEDMAN 69120 Exhaust Header
for 1985 GMC K3500 ALL

$475.89

Save: $62.07
Sale Price:

$413.82

Estimated Ship Date: Today

Free DelieveryFree Ground Shipping
In Stock - 6 New In Stock
EngineFit NotesFitment Notes
1985 GMC K3500 ALL equipped with
L
 
Air Conditioning: Yes
Power Steering: Yes
Auto Transmission
Column: Yes
Auto Transmission
Floor: Yes
Manual Transmission
Column: No
Manual Transmission
Floor: Yes
Footnotes: (139) Must use 1975 and later model clutch linkage located at rear of engine.
Footnotes: (6) Modification to stock exhaust required to retain catalytic converter.
Footnotes: (208) Due to cylinder heads (aluminum) generation 6 engines, 502 BB Chevy may have clearance problems on some applications. Bottom of header flanges may hit head bolts. Notching may be necessary.
Footnotes: (1) Without smog injection or injection heads.
Footnotes: (112) Must use factory big block chevy hardware and mounts.
Emissions Notes: RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Fuel Type: GA
 
1985 GMC K3500 ALL equipped with
L Air Conditioning: Yes
Power Steering: Yes
Auto Transmission
Column: Yes
Auto Transmission
Floor: Yes
Manual Transmission
Column: No
Manual Transmission
Floor: Yes
Footnotes: (139) Must use 1975 and later model clutch linkage located at rear of engine.
Footnotes: (6) Modification to stock exhaust required to retain catalytic converter.
Footnotes: (208) Due to cylinder heads (aluminum) generation 6 engines, 502 BB Chevy may have clearance problems on some applications. Bottom of header flanges may hit head bolts. Notching may be necessary.
Footnotes: (1) Without smog injection or injection heads.
Footnotes: (112) Must use factory big block chevy hardware and mounts.
Emissions Notes: RACE ONLY! NOT LEGAL for public street or highway use on '75-later vehicles.
Fuel Type: GA
,
FLOWTECH 11500FLT
Please Note:

Some images might not represent the actual product

FLOWTECH 11500FLT Exhaust Header
for 1985 GMC K3500 ALL

$273.86

Save: $35.72
Sale Price:

$238.14

Estimated Ship Date: Today

Free DelieveryFree Ground Shipping
In Stock - 13 New In Stock
EngineFit NotesFitment Notes
1985 GMC K3500 ALL equipped with
5.7L V8
 
1.5 in. Primary Tubing
3 in. Collector Size
Mild Steel
Black Painted Finish
Gaskets
Hardware
Intended For Race Use Only
May Require Clutch Linkage Modification~Does Not Fit w/Angle Plug Heads~Req. A/C Bracket PN[10042FLT]
 
1985 GMC K3500 ALL equipped with
5.7L V8 1.5 in. Primary Tubing
3 in. Collector Size
Mild Steel
Black Painted Finish
Gaskets
Hardware
Intended For Race Use Only
May Require Clutch Linkage Modification~Does Not Fit w/Angle Plug Heads~Req. A/C Bracket PN[10042FLT]