Do both you should get like 300hp lolz maybe 2-3hp??

 

Where did you dyno at? Aslo did you swap to 4.10s or did you find a 4wd with them. I searched all over for a z71 with 4.10's. Figures day after I bought my truck, 5 of them rolled into the lot.

 

My dyno was a universal dyno like g-tech that my friend had on his civic so it may be off a litle, the 4.10 gears comes with the light duty package

Light duty includes:
HD suspension
5.3 Almnblk 310hp
4.10 gears
hd Trailering

I got it for 30k it's a W/T hehe

 

I couldn't see either being good for more than .5 to 1HP....I've seen claims of 5 to 10HP, and even a dyno graph somewhere, but I'd chalk up 4 to 9 of those HP to embelishment and/or marketing.

 

I agree, I saw a show on the Speed channel, claiming a vehicle will get 10-15 hp by switching to an iridium plug