Thread: VSRF FBO WHP Expectations? 500HP Seriously?
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      11-04-2021, 11:56 AM   #51
335xirookie
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Quote:
Originally Posted by sduncan219 View Post
Hello, If I am doing FBO's do I require 1 step colder plugs or 2?
Thanks
1 step colder will work up to 700+HP then go two step....
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