Hi, were in the process of building a 408 for my dads 99 silverado, were looking for 1 & 3/4" headers that fit good, we were hoping for longtubes also but there doesn't seem to be many options that I have seen so far for a 4x4 truck. Also do they make an x-pipe for silverados? Thanks in advance guys!
Last edited by mr2cam; 02-25-2010 at 01:52 PM.
I have one more question too, I bought a set of precision 42lb injectors off of a guy from ls1tech.com, but they are a lot taller then the stock 6.0 truck injectors, the only way I can see making them fit would be to put spacers on where the rail bolts into the intake manifold, is that normal? I will take a picture of the injectors when I get back from lunch.
X pipes are universal to any truck just depends where you install it, those 1 3/4 headers arent gonna let that 408 breathe very well, it will but not enough look for at lease 1 7/8's
ARH or LPP may have what youre looking for !
Simple: 408 on steroids!
single digits coming soon!
Very common. They must be fbody LS1 injectors.Originally Posted by mr2cam
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
Thanks for the advice, I will look into those headers!
So there shouldn't be a problem if I put a spacer on the intake manifold where the rail bolts on to?
not at all, a very common modification. Usually those injectors won't be plug and play, you'll need new pigtails or adapters to wire the injectors into the harness.
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
Ya they are definately a different style, I found some adapters from FAST that I think will work. Anyway thanks for your help.
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