Black Thermal Barrier Coated Long Tube Exhaust Headers for 1988-1998 Chevy GMC 4WD OBS Trucks & SUVs | 305/350 V8 | Certified Automotive Experts
Upgrade your OBS truck or SUV with Certified Automotive Experts Black Thermal Barrier Coated Long Tube Exhaust Headers. Designed for 1988-1998 Chevy and GMC 4WD applications equipped with 5.0L 305 or 5.7L 350 small block V8 engines, TBI or Vortec, these headers are engineered to improve exhaust flow, throttle response and overall performance.
Featuring 16-gauge mandrel-bent carbon steel tubing with 1-5/8-inch primary tubes and 2-1/2-inch collectors, these headers are designed to support improved exhaust scavenging and stronger mid-to-high-RPM power characteristics. Reinforced TIG-welded construction and CNC laser-cut 5/16-inch flanges provide durability, strength and sealing performance under high-temperature conditions.
The black thermal barrier coating helps manage underhood heat while providing a clean performance appearance.
Fitment note: 4WD only. These headers are not intended for GMT800 new-body-style trucks or SUVs. This long tube design replaces both factory manifolds and the factory Y-pipe, so a custom exhaust from the collectors back is required.
Key Features
Black Thermal Barrier Coating: Helps manage underhood heat while providing a clean performance appearance.
Mandrel-Bent Carbon Steel Tubing: 16-gauge tubing with 1-5/8-inch primary tubes and 2-1/2-inch collectors.
Long Tube Design: Engineered to support improved exhaust scavenging and stronger mid-to-high-RPM power characteristics.
TIG-Welded Construction: Reinforced TIG-welded construction supports durability under demanding conditions.
CNC Laser-Cut Flanges: Features 5/16-inch flanges designed to provide strength and sealing performance.
Performance-Oriented Design: Engineered to improve exhaust flow, throttle response and overall performance.
| Specification | Details |
|---|---|
| Brand | Certified Automotive Experts |
| Product Type | Long Tube Exhaust Headers |
| Material | Steel |
| Coating | Black Thermal Barrier Coating |
| Primary Tube Diameter | 1-5/8 inches |
| Collector Diameter | 2-1/2 inches |
| Flange Thickness | 5/16 inch |
| Tube Construction | Mandrel-bent |
| Welding | Reinforced TIG-welded construction |
| Flange Construction | CNC laser-cut |
| Engine Types | Small Block V8 |
| Engine Sizes | 5.0L 305 / 5.7L 350 |
| Main Model Years | 1988–1998 |
| Drivetrain Application | 4WD |
| Additional Potential Fitment | Certain 1999–2000 Classic carryover body-style models |
These long tube exhaust headers are designed for compatible 1988–1998 Chevy and GMC 4WD OBS trucks and SUVs equipped with 5.0L 305 or 5.7L 350 small block V8 engines.
Listed applications include:
Certain 1999–2000 Classic carryover body-style models may also be compatible.
Fitment Exclusions: These headers are not intended for 1999 and newer new-body-style GMT800 trucks or SUVs.
Depending on the vehicle configuration and factory equipment, installation may require minor modifications, repositioning, or clearancing. Potential adjustment areas include:
These considerations are described as common with performance long tube header installations and are not considered product defects. Professional installation is recommended for best results.
Q: Which engines are these headers designed for?
A: They are designed for compatible 5.0L 305 and 5.7L 350 small block V8 engines.
Q: Which vehicles are listed for fitment?
A: Listed applications include the Chevy and GMC K1500, K2500, Tahoe, Yukon, Suburban, and Blazer, covering compatible 1988–1998 4WD OBS configurations.
Q: What are the primary tube and collector sizes?
A: The headers feature 1-5/8-inch primary tubes and 2-1/2-inch collectors.
Q: What type of coating do these headers have?
A: They feature a black thermal barrier coating designed to help manage underhood heat.
Q: Will these headers fit 1999–2000 Chevy or GMC trucks?
A: Certain 1999–2000 Classic carryover body-style models may be compatible. They are not intended for 1999 and newer GMT800 new-body-style trucks or SUVs.
Q: Can installation require modifications?
A: Yes. Depending on the vehicle setup and factory equipment, minor modification, repositioning, or clearancing may be required around the column-shift linkage, steering components, or power steering brackets.
Q: Are these headers suitable for off-road and towing builds?
A: The description identifies street-driven, towing, off-road, and performance-oriented builds as intended applications for compatible vehicles.
Q: Are these headers designed to improve engine performance?
A: They are engineered to improve exhaust flow, throttle response, and overall performance, with a design intended to support stronger mid-to-high-RPM power characteristics. Specific performance gains are not provided.
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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