Mopar Deluxe Air Cleaner Nut Chrome w/Blue Emblem

The PROFORM Mopar Deluxe Air Cleaner Nut Chrome with Blue Emblem (model 440-337) is a premium finishing component designed for Mopar engine dress-up and restoration applications. This chrome-plated aluminum air cleaner nut combines factory-correct aesthetics with dual-thread compatibility, accommodating both 1/4-20 and 5/16-18 fastener sizes to match OEM specifications across multiple Mopar engine bay configurations.

Manufactured from aluminum and finished in mirror-bright chrome plating, this nut delivers the authentic Mopar Omega logo appearance in blue that restorers and enthusiasts seek for period-correct engine compartment presentation. The dual-thread design eliminates guesswork during assembly—whether securing an air cleaner housing to a 1/4-20 stud or 5/16-18 bolt, this component threads cleanly without adapter plates or modifications. The lightweight construction (0.12 lbs) ensures no measurable impact on underhood weight while providing the corrosion-resistant properties chrome plating offers in automotive environments.

This fastener serves engine restoration specialists, classic Mopar owners, and hot rod builders who prioritize OEM-correct appearance and fitment. Buyers restoring 340, 360, 383, 440, or other Mopar big-block and small-block engines will recognize this component as essential trim hardware. PROFORM's positioning in the restoration market emphasizes catalog-accuracy—each piece is engineered to match factory specifications rather than provide cosmetic approximations, making this nut a direct replacement for original equipment or a key element in complete engine dress-up kits.

For builders prioritizing authenticity, the dual-thread accommodation is a practical advantage: Mopar engine blocks and intake manifolds from different production years and displacement classes vary in fastener sizing, and having a single nut that threads both sizes reduces inventory needs and compatibility risk during assembly.