85-89 Corvette Filter

The K&N 85-89 Corvette Filter (model 33-2014) is a high-flow replacement air filter engineered specifically for C4 Corvette engines from 1985 through 1989. Built for enthusiasts who demand both performance and reliability, this reusable cotton panel filter replaces the factory paper element while maintaining proper airflow dynamics and engine protection. Whether you're building a modified C4 or simply upgrading from a restrictive OEM filter, the K&N design delivers noticeable throttle response gains without compromising air quality control.

This 85-89 Corvette Filter utilizes K&N's proprietary pleated cotton media construction, which increases surface area compared to conventional paper filters and allows roughly 50% more airflow at the same restriction level. The media is treated with K&N's signature red oil coating to trap particles while maintaining minimal pressure drop across the element. Measuring 16 x 7.75 inches with a 1.063-inch tall profile, this panel configuration fits the stock intake housing precisely, requiring no modifications or adapter brackets. The reusable design means you'll clean and re-oil it every 15,000–20,000 miles—a process that takes minutes and costs pennies compared to repeated disposable filter replacements.

C4 Corvette owners—from daily-driver enthusiasts to track day participants—benefit most from this upgrade because the stock airbox can become a bottleneck once any fuel mapping or intake modifications are introduced. The 85-89 Corvette Filter pairs seamlessly with mild cam upgrades, tuned exhausts, or ECU recalibrations, preventing air starvation that would otherwise limit potential gains. Installation is straightforward: remove the airbox lid, swap out the old filter, and reassemble—no special tools required. K&N backs this filter with a 10-year unlimited-mileage warranty, making it a bulletproof investment for any C4 owner serious about long-term performance and engine longevity.