5.3, headers (shorty), procharger and SINGLE exhaust. I'm lookin to get some hi flow cats and true dual exhaust. I have heard that H and Y pipes come w/ hi flow cats. Is there any places online to purchase these and what are the differences? Any significant gains in HP or Torque w/ either one of these setups. thanks in advance for the info.
Last edited by hotcornernoprob; 08-07-2007 at 09:14 AM.
2002 Chevrolet Silverado Extended Cab. 5.3 w/ Procharger at 9psi. 1/4 mile 13.314 102.37mph 1.98 60ft.
http://i172.photobucket.com/albums/w6/hotc...pg?t=1175977222
http://i172.photobucket.com/albums/w6/hotc...pg?t=1175977270
http://i172.photobucket.com/albums/w6/hotc...pg?t=1176154623
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