Off-Road Forums & Discussion Groups - View Single Post - TFI and HEI what's the difference?
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post #1 of (permalink) Old 09-07-2005, 10:15 AM Thread Starter
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TFI and HEI what\'s the difference?

happy humpday forum...i keep coming across the terms HEI and TFI. what's the difference and what is preferred? cost-wise and performance?
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