Review on AFe Power Silver 46 34001 Throttle by Edgar Rowe

After installing the spacer, my processor took a minute to complete the air adjustment. It increased my mileage by about 2mpg on my 5.3 and I really can't tell if it increased my horsepower. It could have slightly better throttle response, but I really can't tell much of a difference. The improvement in mileage made me happy so for the price I would recommend it to anyone who has a full size truck with a 5.3 liter engine.