Boost & PAC 1518's = 2 Broken Springs....
#15
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dual spring all the way. too many beehives breaking. ran patriot duals for 4 yrs hundreds of 7000rpm revs. i worry about the stock lifters w/ increased spring pressure before the rockers. Patriot duals have 155lb seat i believe.
#20
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Any downsides to running dual springs on a low lift (<0.570") cam and LS7 lifters?