OTR Filters Round Pit Tuning Air Filter Element - 6.625 in Diameter - 3 in Tall - Gray - Holley 4150 Flange Rocker Cover GM A-Body / F-Body /

GM A-Body / F-Body / X-Body 1970-78

That work continues today through Holley’s market-leading EFI products as well as through Holley’s family of best-in-industry brands

Jeep Wrangler CJ 1980-86

7/8-14 in Left Hand Female Thread

Reduces need for octane by up to two points

OTR Filters Round Pit Tuning Air Filter Element - 6.625 in Diameter - 3 in Tall - Gray - Holley 4150 Flange Rocker Cover GM A-Body / F-Body /Product Description: Air Filter Element Round Pit Tuning 6. 625 in Diameter 3 in Tall Paper Gray Holley 4150 Flange Sold Individually US based OTR Filters was founded on developing air filtration solutions that help engines breathe easier, run faster, and perform at their best. With a wide range of filters for everything from street performance to hardcore racing, OTR Filters combines excellent performance with maximum engine protection.