You will first need to search becasue this topic has been talked about numerous times. You will find all your answers there. Not trying to soun dlike a jerk, but thats where I would start.
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2007 Impala SS with every option it has available!
only if you plan to run lots of boost 8psi+ (i say this because i know you can run more probably safe, but its wise to upgrade if you plan to go past 8)
__________________ -Josh-
01' 4 Door Blazer
2 RE audio SR15's
6 cubes @ 30.5hz
PG RSD65CS in kickpanels
US Amps IS2080 powering PG's
Big 3 done in 1/0
2 Gauge ran back to optima yellow top