Re: Gas milage help!!!
Simulators work good, have them on my 98 truck. If they are available for the 6l def would. If they are not available you need some cats. Ive never sourced them for a 6l so i honestly cant make that call. Google is your friend...
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1987 Jeep YJ 403hp sbc 653hp on NOS
1998 Chev Z71
2007 Chev Trailblazer SS
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