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Twin pluging adds around 250-300 to a complete head rebuild, at least where I shop. So, if you need guides or valves now, and in the future have more money to tear into the motor and up the CR, it may not be a bad idea. You just need to make sure you will do the other mods while the guides and valves are still in good condition.
If not, when you tear into it again, even if the guides are toast again, at least the work is already done.
Cheers
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Turn3 Autosport- Full Service and Race Prep
www.turn3autosport.com
997 S 4.0, Cayman S 3.8, Cayenne Turbo, Macan Turbo, 69 911, Mini R53 JCW , RADICAL SR3
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