Magnesium bronze guides or silicone bronze guides

xX03COBRAXx

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Alright guys so I'm doing a head rebuild on my cobra and can't decide wether to get magnesium bronze guides or silicon bronze guides .what should I get?
 

SlowSVT

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You left out the OEM PM guides.

If you want guides that will wear better and can tolerate more heat the factory guides are the way to go. Bronze will not hold-up as well especially the exhaust side.
 

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