Bowtie Slant-Edge Breather Cap Black Bowti

The Bowtie Slant-Edge Breather Cap Black Bowti is a precision engine breather designed for builders and enthusiasts who demand clean, efficient crankcase ventilation without sacrificing engine bay aesthetics. This push-in breather cap addresses a critical cooling and pressure management need in high-performance and street applications, where proper crankcase evacuation prevents harmful pressure buildup and extends engine life. Built by PROFORM, a leader in engine dress-up components, this breather delivers both function and visual appeal to any project.

Constructed from polished aluminum with a reusable design, the Bowtie Slant-Edge Breather Cap features a slant-edge profile that optimizes airflow while the recessed black bowtie logo provides signature branding. The push-in installation system fits a standard 1-1/4 inch hole, making it compatible with most engine valley pan and block designs. The slant-edge geometry reduces turbulence compared to flat-cap designs, allowing crankcase vapors to escape more efficiently while minimizing backpressure—a detail that matters in both naturally aspirated and forced-induction builds where every fraction of pressure reduction improves ring seal and reduces oil consumption.

Engine builders, restoration shops, and custom car enthusiasts specify this cap for small-block Chevy, big-block, and comparable engine platforms where traditional breathers lack the refined finish required by show-quality builds. Installation is straightforward: simply push the breather cap into the 1-1/4 inch valve hole on the engine block or valley pan. The polished aluminum finish resists corrosion and complements popular engine dress-up packages, making it ideal for customers balancing performance integrity with visual presentation. Reusable construction ensures long-term value and easy servicing during future maintenance cycles.