1985-1991 C4 Air Pump Eliminator Pulley Kit
Ditch the dead weight and unlock hidden horsepower with this 1985–1991 Air Pump Eliminator Pulley Kit—a smart bolt-on upgrade designed to eliminate the restrictive A.I.R. system and reduce engine drag. By replacing the factory air pump assembly with this lightweight aircraft-grade aluminum bracket and pulley, you’ll shed up to 20 pounds from the front of your engine and gain quicker revs and sharper throttle response.
Unlike typical deletes, this kit retains use of your factory serpentine belt in most applications. The precision-polished aluminum bracket improves underhood appearance, ensures valve cover clearance, and provides a clearer view of your engine timing mark. Includes Grade 8 hardware and installation instructions for a clean, secure fit.
Features
• Fits 1985–1991 C4 with factory serpentine accessory drive
• Eliminates A.I.R. pump and associated drag
• Polished aircraft-grade aluminum bracket with idler pulley
• Includes Grade 8 bolts and hardware
• Bolt-on installation—no fabrication required
• Retains original serpentine belt in most cases
Dimensions and Weight
• Application: 1985–1991 C4, off-road and race use only
• Material: Billet Aluminum Bar and Pulley
• Approximate Weight Reduction: 20 lbs
• Finish: Polished Aluminum
Tech Notes
• For off-road and race use only
• Belt length may vary by application—GM used multiple pulley combinations
• New belt may be required depending on alternator and A/C pulley diameter
Because Details Matter
This kit isn't just about style—it’s about function. Whether you’re building a cleaner engine bay or chasing better quarter-mile times, removing the A.I.R. pump with this high-quality pulley setup helps get more power to the rear wheels, with no compromise in belt alignment.
Under the Straw Hat – Restorer’s Insight
C4s are full of opportunity for subtle performance gains, and this is one of the easiest. By shedding unnecessary emissions hardware, you free up horsepower, simplify your accessory drive, and keep your car looking sharp while running stronger.
Also known under these part numbers: (For reference only)
- 100101
- 5949
- 686420016830
- 71706