common upgrade

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12-11-2009, 11:36 AM

dennison

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Join Date: Dec 2009

Posts: 8

common upgrade

what is a common upgrade to gain hp out of a 420a motor?

12-11-2009, 05:26 PM

dsm1990gsx

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Join Date: Oct 2007

Location: Pa

Posts: 4,682

What are your plans? Most guys will put an intake and exhaust but your not gonna really gain much hp.

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