PAUL JOHNSON CustomROM, Flex Fuel, etc

****NEW CustomROM Features Available Now!  Our first release of the bootmod3 CustomROM is now ready for the S55 engine vehicles while we continue to work...

PJT Custom Tunes for B58

Custom tuning for B58 is available for pump gas, race gas, full E85 and E85 blends, and methanol injection. Results will vary depending on...

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