OTR Filters Round Pit Tuning Air Filter Element - 6.625 in Diameter - 3 in Tall - Gray - Holley 4150 Flange R8472BK 1/2" & 3/8" Stud Hole

1/2" & 3/8" Stud Hole Combination

And Quieter Than Ever

the Racing Optics XStack is a complex optical device

Speed Warning Light

The bottom line is that if you want to make more power

OTR Filters Round Pit Tuning Air Filter Element - 6.625 in Diameter - 3 in Tall - Gray - Holley 4150 Flange R8472BK 1/2" & 3/8" Stud HoleProduct 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.