Upgrade your GM OBS truck with Certified Automotive Experts 304 Stainless Steel Long Tube Exhaust Headers. Designed for compatible 1988–1998 Chevy and GMC C1500, C2500, K1500, and K2500 applications, these headers are engineered to improve exhaust flow and support increased horsepower and torque, particularly through the mid- to high-RPM range.
Built from durable 16-gauge mandrel-bent 304 stainless steel, these long tube headers feature TIG-welded joints for strength and resistance to cracking. The CNC laser-cut 5/16-inch flanges provide a precise mounting surface, while the polished stainless steel finish delivers excellent corrosion resistance and a clean, professional appearance.
These headers are designed for compatible GM OBS truck configurations, including:
Important: Always verify your exact year, engine, drivetrain, and vehicle configuration before ordering.
The headers are manufactured from 16-gauge 304 stainless steel with mandrel-bent tubing to maintain consistent internal diameter and support efficient exhaust flow. TIG-welded joints add strength and help improve resistance to cracking under the heat and vibration associated with performance exhaust systems.
The polished stainless steel finish provides a clean appearance while offering strong resistance to corrosion, making these headers well suited for street trucks, performance builds, restorations, and custom exhaust systems.
The 1 5/8-inch primary tubes and 2.5-inch collectors are designed to provide an efficient path for exhaust gases and support improved engine breathing. The long tube configuration is intended to help increase horsepower and torque, particularly in the mid- to high-RPM range.
These headers may require minor modification or clearance adjustments during installation.
Long tube headers can have limited clearance with certain factory components depending on the vehicle's drivetrain, options, configuration, and condition. On some applications, adjustments may be required around:
Depending on your specific truck, installation may require repositioning, trimming, or adjusting certain components.
These fitment considerations are common with performance long tube headers and do not necessarily indicate a product defect. Because vehicle configurations can vary, professional installation or installation by an experienced mechanic familiar with custom exhaust systems is recommended.
What vehicles do these headers fit?
They are designed for compatible 1988–1998 Chevy and GMC C/K trucks, including C1500, C2500, K1500, and K2500 applications.
What material are these headers made from?
They are constructed from 16-gauge 304 stainless steel with mandrel-bent tubing and TIG-welded joints.
What size are the primary tubes?
The primary tubes measure 1 5/8 inches.
What size are the collectors?
The collectors measure 2.5 inches.
What size are the header flanges?
The headers feature CNC laser-cut 5/16-inch flanges.
Will these headers bolt directly onto my truck?
Fitment can vary depending on the exact vehicle configuration. Minor clearance adjustments or modifications may be required around components such as the column-shift linkage or power steering pump bracket.
Do these headers improve performance?
The long tube design is engineered to improve exhaust flow and support increased horsepower and torque, particularly at mid- to high-RPM.
Are these headers suitable for 1999–2000 trucks?
Some 1999–2000 Classic applications may carry over from the earlier OBS platform. Verify your exact vehicle and engine configuration before ordering.
Is professional installation recommended?
Yes. Because some applications may require clearance adjustments or minor modifications, installation by an experienced mechanic or exhaust professional is recommended.
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