Black Aluminized Thermal Coating | Small Block Chevy 265–400 V8 | Square Body Applications
Upgrade your classic Chevy or GMC truck with Certified Automotive Experts Thermal Coated Headers, designed for compatible 1973–1987 C/K-series trucks and related Square Body applications. Built for Small Block Chevy V8 engines ranging from 265 to 400 cubic inches, these headers provide an efficient exhaust path for classic truck restorations, street builds, and performance projects.
Featuring 1-5/8-inch primary tubes, 2.5-inch collectors, CNC-machined 3/8-inch mounting flanges, and TIG-welded construction, these headers combine durable materials with a performance-focused design.
The black aluminized thermal coating adds corrosion protection and helps manage exhaust-related heat exposure while providing a clean, durable finish for your engine bay.
Square Body Chevy & GMC Fitment: Designed for compatible 1973–1987 C/K-series trucks and related SUV applications.
Small Block Chevy Compatibility: Fits compatible Gen 1 SBC V8 engines ranging from 265 to 400 cubic inches.
1-5/8-Inch Primary Tubes: Designed to provide an efficient exhaust path for compatible V8 applications.
2.5-Inch Collectors: Collector outlets designed for compatible exhaust system connections.
CNC-Machined Flanges: Features 3/8-inch mounting flanges for a consistent mounting surface.
TIG-Welded Construction: Precision-formed steel tubing with TIG-welded joints for durable construction.
Black Aluminized Thermal Coating: Helps protect against corrosion and provides additional heat protection.
2WD & 4WD Applications: Suitable for compatible two-wheel-drive and four-wheel-drive configurations.
Complete Installation Package: Includes both header assemblies, head gaskets, collector gaskets, and mounting hardware.
| Feature | Specification |
|---|---|
| Brand | Certified Automotive Experts |
| Product Type | Thermal-Coated Exhaust Headers |
| Vehicle Platform | Chevy & GMC C/K-Series |
| Model Years | 1973–1987 |
| Engine Compatibility | Small Block Chevy V8 |
| Engine Displacement | 265–400 Cubic Inches |
| Primary Tube Diameter | 1-5/8 Inches |
| Collector Outlet Diameter | 2.5 Inches |
| Flange Thickness | 3/8 Inch |
| Flange Construction | CNC-Machined |
| Tube Construction | Precision-Formed Steel |
| Welding | TIG-Welded |
| Finish | Black Aluminized Thermal Coating |
| Drive Configuration | Compatible 2WD & 4WD |
| Gaskets | Copper/Fiber Multi-Layer Head Gaskets |
| Collector Gaskets | Copper |
| Mounting Hardware | Included |
These headers are designed for compatible configurations of the following Chevy and GMC vehicles:
| Vehicle | Model Years |
|---|---|
| Chevrolet C10 | 1973–1987 |
| Chevrolet K10 | 1973–1987 |
| Chevrolet C20 | 1973–1987 |
| Chevrolet K20 | 1973–1987 |
| Chevrolet C30 | 1973–1987 |
| Chevrolet K30 | 1973–1987 |
| Chevrolet Blazer | Compatible Square Body Applications |
| GMC Jimmy | Compatible Square Body Applications |
| Chevy/GMC Suburban | Compatible Square Body Applications |
Engine Application: Compatible Small Block Chevy V8 engines from 265 to 400 cubic inches.
Drive Configuration: Designed for compatible 2WD and 4WD applications.
Vehicle model, year, engine, and chassis configuration must be verified before ordering.
These headers feature precision-formed steel tubing, TIG-welded joints, and CNC-machined 3/8-inch flanges for durable construction and a consistent mounting surface.
The black aluminized thermal coating provides a protective finish designed to resist corrosion and withstand exhaust-related heat exposure. It also helps manage heat within the engine bay compared with uncoated steel surfaces.
Featuring 1-5/8-inch primary tubes and 2.5-inch collector outlets, these headers are designed to provide an efficient exhaust path for compatible Small Block Chevy V8 engines.
Their performance-focused configuration makes them suitable for:
Classic Square Body truck restorations.
Small Block Chevy engine builds.
Street performance trucks.
Custom Chevy and GMC projects.
Compatible 2WD and 4WD applications.
| Component | Quantity |
|---|---|
| Left Header Assembly | 1 |
| Right Header Assembly | 1 |
| Copper/Fiber Multi-Layer Head Gaskets | Included |
| Copper Collector Gaskets | Included |
| Mounting Hardware | Included |
1. What vehicles do these headers fit?
These headers are designed for compatible 1973–1987 Chevy and GMC C/K-series trucks and related Square Body applications, including C10, K10, C20, K20, C30, K30, Blazer, Jimmy, and Suburban models.
2. Which engines are compatible with these headers?
They are designed for compatible Gen 1 Small Block Chevy V8 engines ranging from 265 to 400 cubic inches.
3. What size are the primary tubes?
The primary tubes measure 1-5/8 inches in diameter.
4. What size are the collector outlets?
The collector outlets measure 2.5 inches in diameter.
5. How thick are the mounting flanges?
The headers feature CNC-machined mounting flanges measuring 3/8 inch thick.
6. What material are these headers made from?
They are constructed from precision-formed steel tubing with TIG-welded joints and CNC-machined mounting flanges.
7. What type of coating do these headers have?
They feature a black aluminized thermal coating designed to provide additional heat protection and corrosion resistance.
8. Are these headers compatible with both 2WD and 4WD trucks?
Yes. They are intended for compatible 2WD and 4WD Chevy and GMC applications. Verify your specific chassis and engine configuration before ordering.
9. Are gaskets and mounting hardware included?
Yes. The package includes left and right header assemblies, copper/fiber multi-layer head gaskets, copper collector gaskets, and mounting hardware.
10. Are these headers suitable for Square Body builds?
Yes. They are designed for compatible 1973–1987 Chevy and GMC Square Body truck and SUV applications.
11. Are these long-tube headers?
They are described as a long-tube-style exhaust design intended to provide an efficient exhaust path for compatible Small Block Chevy applications. Verify the specific header configuration and available clearance before purchasing.
Before ordering, confirm the following:
Vehicle make, model, and year.
Small Block Chevy engine model and displacement.
2WD or 4WD configuration.
Engine mounting and chassis setup.
Steering shaft and frame clearance.
Collector and existing exhaust system compatibility.
Installation requirements may vary depending on the vehicle and engine configuration. Additional exhaust modifications may be necessary.
Important Fitment Notice: Designed for compatible 1973–1987 Chevy and GMC Square Body applications with Small Block Chevy V8 engines. Vehicle year alone does not guarantee fitment. Always verify engine, chassis, mounting configuration, and exhaust clearance before ordering.
WARNING: RACE / COMPETITION USE ONLY
This part is built and sold only for racing vehicles used solely in closed-course competition. Once this part is installed, the vehicle may never be used, or registered or licensed for use, on a public road or highway. Off-road or off-highway use is not competition use. Installing this part on a vehicle used on public roads may violate the federal Clean Air Act, 42 U.S.C. 7522(a)(3), and state law, and may result in civil or criminal penalties, failed inspections and loss of registration. Emissions laws vary by state. Check yours before you buy.
NOT LEGAL FOR SALE OR USE IN CALIFORNIA ON ANY POLLUTION CONTROLLED MOTOR VEHICLES. THE SALE, USE OR INSTALLATION OF THIS PRODUCT MAY ALSO BE ILLEGAL NATIONWIDE UNDER THE FEDERAL CLEAN AIR ACT (42 U.S.C. 7522(a)(3)).
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