ngk iridium's with magnecore wires. this is an awsome set up.
04 supercrew 5.4 3 valve-magnaflow catback
formerly 02denali 12.79@107
I put in the Bosh Platinum 4's and they are awesome.I got about 2 mpg better and I cuold tell a good difference in response. Bolt on parts Magazine supposedly put them in a 5.3L and dyno'd it out at 7 hp at the wheels better. Sounds high to me but I could tell a little diffrence.
2003 LT, 5.3L Silverado Z71 Dark Grey Metalic
AEM Brute Force intake
Cat back Flowmaster 40 serries 3" duals
Bosch Platinum +4 plugs
I had a set of Bosch 4's in my old truck. I bought them for 6 bucks a piece, which was a lot of money to a 16 year old. The next week, I was out of town and my mom took the truck to get a tune up and lo and behold, I had no more Bosch +4's.
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