DeWitts: 1966-67 GTO Auto, 25.5" x 17.5" Core, Direct Fit With A/C cars ID850 - Slightly louder than stock

- Slightly louder than stock Touring

but moves the crank idler pulley (bottom pulley) up and away from the crank pulley to allow for drive rings sized 9

Model: 1238005M  (Black/Manual)

a simple mark and cut (no welding required) mates the ARH Bottleneck Eliminator to your Catback

HP Tuners data:

DeWitts: 1966-67 GTO Auto, 25.5" x 17.5" Core, Direct Fit With A/C cars ID850 - Slightly louder than stockPONTIAC GTO PRO SERIES (2 ROW 1. 00" TUBES) DeWitts Pro series aluminum radiators feature two rows of 1. 0" wide cooling tubes which provides a 25% increase in cooling performance. Our Direct Fit aluminum radiators feature factory type press formed end tanks, serpentine fins, and the factory type upper and lower channels. Each radiator core is assembled and brazed in our state of the art aluminum brazing furnace. DeWitts radiators are also epoxy free