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Discussion Starter #1
dose a 3k defuel right at 3000 rpms or is that just a benchmark number cuz with stock springs (2200??) it will almost hit 3 i just dont know which would be better 3 or 4 if the 3k is only going to give 100 rpm difference i feel like i should go 4k they are just more expensive
 

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CAPTAIN DILLIGAF
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:thumbsup: I PUT THE 3GSK IN MY 12V AND IT WAS GREAT FOR TOWING THE BIG FIFTH WHEEL AND WHEN I NEEDED A LITTLE EXTRA UMMP
 

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i ordered the Pacbrake GSK which came with the extra mini springs for the 4k kit but i left them out. Same price $100 delivered
 

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If you buy the 4K kit you essentially get both for the same price. I believe they are the same except the 4K has an additional spring. I bought a 4k and installed it as a 3K and liked it. So I added the other spring making it a 4K. I thought it made the throttle a little too touchy so I put it back to 3K.

Buy the 4k. It comes with a free 3k :)
 

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ok the eternal question i have been searching for this seemed like a good place to ask, since i'll bee installing a 4k with valve springs highly recomended with the 4k by the way will it get better fuel economy?????:kick:
well as long as i keep my foot out of it.
 
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