I stopped making kits now, the best out there in my opinion is Big Johns, nice and strong and it includes all you need. If you want a cooled extension, then Powderlite is only option.....Its pretty spendy though
A buddy of mine bought Big Johns kit and it was what he said it was COMPLETE kit.This kit is very strong and looks great.I helped with this kit and it took about 3 hours to install.
He has since then put 800 miles on with no overheating problems.
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