Originally Posted by gtcoupe95
upgrade from cobra intake (EL) to explorer
HO intakes were the stock intakes that all EB, ED, EF, EL's got from the factory and these flow the least.
Explorer intakes are originally off the U.S. Ford Explorer SUV's and were fitted to all the AU V8's. They flowed much much better than the HO intakes.
The Cobra intakes are off the Mustang Cobra's and were fitted to the ED Sprint's. These flowed a little better again than the Explorer intakes.
GT40P's have four vertical bars cast into the outside of the cylinder as well as "GTP".