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 compatible 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, these headers are engineered to improve exhaust flow, throttle response, and overall performance.

Featuring mandrel-bent 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. Designed for street-driven and off-road OBS builds, these long tube headers are also suited to towing and performance-oriented applications.

Certain 1999–2000 Classic carryover body-style models may also be compatible. These headers are not intended for 1999 and newer GMT800 new-body-style trucks or SUVs.

Key Features

• Black Thermal Barrier Coating: Helps manage underhood heat while providing a clean performance appearance.
• Mandrel-Bent Steel Tubing: Features 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.
• Multiple Build Applications: Designed for compatible street, towing, off-road, and performance-oriented builds.
• Classic OBS Compatibility: Designed for select 1988–1998 Chevy and GMC 4WD trucks and SUVs, with certain 1999–2000 Classic carryover models also potentially compatible.

Product Specifications

Compatibility and Fitment

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:

• K1500
• K2500
• Tahoe
• Yukon
• Suburban
• Blazer

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.

Installation Considerations

Depending on the vehicle configuration and factory equipment, installation may require minor modifications, repositioning, or clearancing. Potential adjustment areas include:

• Factory column-shift linkage
• Steering components
• Power steering bracket clearance

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.

Frequently Asked Questions

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.