Heater boxes that will not only perform but actually heat your car!

These High Performance 1 5/8" ID Heater Boxes have a full length aluminum heat sink to maximize heat transfer just like O.E.. Now you can run ported big valve heads without choking down the air flow at the heater boxes.

The High Performance 1 5/8" ID Heater Boxes feature a grey powder-coated heavy duty stamped outer shell and an extra pair of laser cut flanges to weld on and match-up to your 1 5/8" high performance header system. Mounts up to the original levers, bellows and factory lower cooling tin.