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I purchased a 2002 Camaro ss (auto) and it has the SLP headers and borla exhaust with the SLP intake. I have a sticker on the inside that says 450 hp which I know is at the crank but is it about 350 to the fly with these add ons?
I am also having an issue that every time I try to start it, I have to try to crank it then let off and crank it again for it to start. I do see that it has the MSD plug wires and the starter, battery and everything else is good. Just wondering why I have to turn the key 2x for it to start most of the time. I have searched the internet but can't seem to find out why this is happening and any info would be very much appreciated. Thanks
 

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Have you put a fuel pressure gauge on to see if your getting low pressure on the initial key on prime. Not an ls1 person so I can't tell you the exact fuel pressure, but I'm pretty sure it should be around 40 psi or more.
 
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