Thread: 454 Vortec
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Old 12-22-1999, 07:05 PM
nsmilligan nsmilligan is offline
LawnSite Member
Join Date: Dec 1999
Location: Nova Scotia
Posts: 121
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
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