View Full Version : 454 Vortec

12-22-1999, 07:05 PM
Have a 98 K2500 with the 7.4 (454) any mods to improve gas mileage? Has anyone tried bigger exhaust or chips? Maybe a K&N filter. <br>Bill

02-21-2000, 04:14 AM
Try www.454ss.com they may be able to help you.

03-29-2000, 12:05 PM
you can never go wrong with exhaust and/or a chip. my buddy has a vortec 350 and he put exhaust and it helped the mileage. Just out of curiosity, what kind of mileage does your vortec get stock? <p>frahmie