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Vehicle Info NeededDYNOMAXPART NUMBER: 289-89024
Thrush Header Back Kit 1967-87 GM K-Series Pick-up 4x4 V8
$28299
Ships on Sep 23, 2026
Lowest Price GuaranteeHeader Back Systems for Trucks
- Thrush Header Back Kit
- 1967-87 GM K-Series Pick-up 4x4 V8
- Dual Mufflers
- 2.25'' Diameter
- H-Pipe and header reducers not included.
- Quality Raw Materials Provide Greater Corrosion Resistance
- Provides Longer Life
- Combine State Of The Art Engineering w/Quality Material
- Provides Exceptional Strength And Durability
- Manufactured w/Precision Benders; Fixture Checked
- Insuring Every Part Fits Perfectly
- Providing Quick And Easy Installation
- Pipe Dia. Are Increased From OEM Sizes To Improve Flow
- Pipe Dia. Are Increased From OEM Application Revision:
- GMC K1500 Pickup 1975-86
Emissions Note:
This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.
CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART
Sound and Performance from Your Exhaust!
Thrush/Dynomax Header Back Exhaust Systems come complete with smooth bent pipes, Thrush Turbo mufflers, and all hardware for a complete installation. The systems are designed for use with full-length headers and the exit of the tailpipe in the stock location.
Part TypeExhaust System
Product LineThrush Header Back Exhaust Systems
BrandDYNOMAX
Package Height15.0
Package Width16.0
Package Length69.0
Weight71.1 PG
Part CategoryPerformance Parts
Hardware IncludedYes
Tip IncludedNo
Tailpipe Diameter (In.)2.25
QuantitySold as a kit
System FinishAluminized
Muffler IncludedYes
Muffler QuantityTwo
System StyleHeader-back
Muffler ConfigurationSingle inlet/Single outlet
System MaterialSteel
Exit LocationSplit side
Exit QuantityTwo
Muffler StyleTurbo
Inlet QuantityTwo
Intermediate Pipe Diameter2.25 in (57.15 mm)
Part FitmentSemi Universal
Exhaust TypeDual
Vendor Part Number89024
Package Qty1
Package TypeEA
No Questions
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![Header-Back Dual Exhaust Kit for 1973-1986 Chevrolet, GMC 1/2, 3/4, 1-Ton Truck [4WD, 265-400 ci.]](https://www.jegs.com/images/mini_200/500/555/555-89024.jpg)
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EASY KITS
Some parts are not legal for use in California or other states with similar laws / regulations
