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FlowtechPart 31506FLT✓ Fits 61 vehiclesMade in CN
Product Details
⚙️
Vehicle Fitment & Compatibility
61 applicationsCompatible Engines
5.7L V8 350ci5.0L V8 307ci5.3L V8 327ci4.6L V8 283ci5.4L V8 327ci5.0L V6 305ci
Application Notes
1-5/8 inch Tube DiameterCeramic CoatedStandard HeaderPrimary Tube Coll. Size 1 5/8x2.5 inw/o AIR TubesModify Stck Exh. To Retain Cat. ConverterNot Legal For Street Use.
View all 61 vehicle applications
Years
Make / Model
Submodel
Engine
1969–1974
Chevrolet Blazer
5.7L V8 350ci
1969–1973
Chevrolet Blazer
5.0L V8 307ci
1966–1969
Chevrolet K10 Pickup
5.3L V8 327ci
1966–1967
Chevrolet K10 Pickup
4.6L V8 283ci
1968–1973
Chevrolet K10 Pickup
5.0L V8 307ci
1968
Chevrolet K10 Pickup
5.4L V8 327ci
1969–1974
Chevrolet K10 Pickup
5.7L V8 350ci
1967–1969
Chevrolet K10 Suburban
5.3L V8 327ci
1967
Chevrolet K10 Suburban
4.6L V8 283ci
1968–1973
Chevrolet K10 Suburban
5.0L V8 307ci
1968
Chevrolet K10 Suburban
5.4L V8 327ci
1969–1974
Chevrolet K10 Suburban
5.7L V8 350ci
1966–1969
Chevrolet K20 Pickup
5.3L V8 327ci
1966–1967
Chevrolet K20 Pickup
4.6L V8 283ci
1968–1973
Chevrolet K20 Pickup
5.0L V8 307ci
1968
Chevrolet K20 Pickup
5.4L V8 327ci
1969–1974
Chevrolet K20 Pickup
5.7L V8 350ci
1967–1969
Chevrolet K20 Suburban
5.3L V8 327ci
1967
Chevrolet K20 Suburban
4.6L V8 283ci
1968–1973
Chevrolet K20 Suburban
5.0L V8 307ci
1968
Chevrolet K20 Suburban
5.4L V8 327ci
1969–1974
Chevrolet K20 Suburban
5.7L V8 350ci
1968–1973
Chevrolet K30 Pickup
5.0L V8 307ci
1968–1969
Chevrolet K30 Pickup
5.3L V8 327ci
1968
Chevrolet K30 Pickup
5.4L V8 327ci
1969–1974
Chevrolet K30 Pickup
5.7L V8 350ci
1966
Chevrolet Suburban
4.6L V8 283ci
1966
Chevrolet Suburban
5.3L V8 327ci
1970–1974
GMC Jimmy
5.7L V8 350ci
1970–1973
GMC Jimmy
5.0L V8 307ci
1966–1969
GMC K15/K1500 Pickup
5.0L V6 305ci
1967–1968
GMC K15/K1500 Pickup
5.3L V8 327ci
1967
GMC K15/K1500 Pickup
4.6L V8 283ci
1968–1973
GMC K15/K1500 Pickup
5.0L V8 307ci
1968
GMC K15/K1500 Pickup
5.4L V8 327ci
1969–1974
GMC K15/K1500 Pickup
5.7L V8 350ci
1967–1969
GMC K15/K1500 Suburban
5.0L V6 305ci
1967–1968
GMC K15/K1500 Suburban
5.3L V8 327ci
1967
GMC K15/K1500 Suburban
4.6L V8 283ci
1968–1973
GMC K15/K1500 Suburban
5.0L V8 307ci
1968
GMC K15/K1500 Suburban
5.4L V8 327ci
1969–1974
GMC K15/K1500 Suburban
5.7L V8 350ci
1966–1967
GMC K25/K2500 Pickup
4.6L V8 283ci
1967–1969
GMC K25/K2500 Pickup
5.0L V6 305ci
1967–1968
GMC K25/K2500 Pickup
5.3L V8 327ci
1968–1973
GMC K25/K2500 Pickup
5.0L V8 307ci
1968
GMC K25/K2500 Pickup
5.4L V8 327ci
1969–1974
GMC K25/K2500 Pickup
5.7L V8 350ci
1967–1969
GMC K25/K2500 Suburban
5.0L V6 305ci
1967–1968
GMC K25/K2500 Suburban
5.3L V8 327ci
1967
GMC K25/K2500 Suburban
4.6L V8 283ci
1968–1973
GMC K25/K2500 Suburban
5.0L V8 307ci
1968
GMC K25/K2500 Suburban
5.4L V8 327ci
1969–1974
GMC K25/K2500 Suburban
5.7L V8 350ci
1968–1973
GMC K35/K3500 Pickup
5.0L V8 307ci
1968–1969
GMC K35/K3500 Pickup
5.0L V6 305ci
1968
GMC K35/K3500 Pickup
5.3L V8 327ci
1968
GMC K35/K3500 Pickup
5.4L V8 327ci
1969–1974
GMC K35/K3500 Pickup
5.7L V8 350ci
1966–1967
GMC L3500
5.0L V6 305ci
1966
GMC Suburban
5.0L V6 305ci
No applications match your search.
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Key Features
Breaking in an engine with ceramic coated headers WILL result in damage to the coating and will VOID all warranties. Ceramic coated headers require several heat cycles to fully cure before they will withstand extreme heat. Flowtech recommends using cast
Flowtech headers are the perfect combination of performance and value. Flowtech long tube headers are precision engineered using mandrel bent tubing, formed collectors and 5/16" flanges with sealing rings for a leak-free seal. All mounting hardware and gaskets are included for a simple installation. This header is coated in a high heat and corrosion resistant metallic ceramic thermal coating that increases exhaust velocity and reduces underhood temps for increased performance.
1967-1974 Chevy/GMC 4WD truck, 1/2-3/4-1-Ton, 1967-1974 4WD Blazer/Jimmy K5/Suburban: 283-400, Tube Size 1.625", Collector Size 2.5"
- Fuel Economy From The Engine
- Leak Test For Max Performance
- Ceramic Headers
- Rust And Corrosion Resistance
- Mandrel-Formed Power Plenum
- Leakproof O-Ringed Port Seals
- Include All Mounting Hardware
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About this product
1967-1974 Chevy/GMC 4WD truck, 1/2-3/4-1-Ton, 1967-1974 4WD Blazer/Jimmy K5/Suburban: 283-400, Tube Size 1.625", Collector Size 2.5"
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Product Specifications
Air Injection Tubes
No
Automotive Item Grade
Performance
Bolt Size
3/8-16 x 3/4
Bolts Included
Yes
Brand
Flowtech Exhaust
California Proposition 65 Chemical Name
1
California Proposition 65 Required
Yes
California Proposition 65
Yes
CARB (California) Compliant
No
Category
Exhaust
Collector Attachment
3-Bolt Flange
Collector Diameter
2.50
Collector Reducer Included
Yes
Collector Reducer Outlet Diameter
2.25
Color
Silver
Design
Long Tube
Drive
4WD
EGT Port
No
Emission Code
4
Finish
Ceramic Coated
Flange Thickness
0.3125
Flange Thickness
5/16
Gasket Or Seal Included
Yes
Header Series
Flowtech II
Header Style
Long Tube
Material
Mild Steel
Mounting Hardware Included
Yes
Oxygen Sensor Port
No
Part Type
Exhaust Header
Port Shape
Oval
Primary Tubing Diameter
1 5/8
Primary Tubing Diameter
1.625
Product Type
Headers
Prop 65 Yes/No
Yes
Quantity
Sold as a pair
Sub Category
Exhaust Manifolds
Tube Wall Thickness
18
Warning
California Proposition 65
🛡️
Warranty & Compliance
Warranty
Manufacturer's Limited 90 Day Warranty
Country of Origin
CN
⚠ Prop 65 Warning
Yes
1
Emissions Code
4
HS Code
8708925000
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Dimensions & Shipping
Product Dimensions
42.3 × 21.8 × 9.7 in
Shipping Dimensions
42.3 × 21.8 × 9.7 in
Weight
11544 g (11.54 kg)