| heres some food for thought but i noticed when i had the 5" on my LLY and then switch to the 4" my EGT's dropped a little and the only thing i could come up with is that with the bigger pipe it would loose volasity and then kinda roll around in the pipe leaving more heat in instead of shooting out the back(hope that made sense)so i would highly recommend the Silverline or MBRP 4" SS 304 is the best but if you only drive in some salt go with the 409SS..
__________________ James 
TyreBoyz Pulling Team
Pulling Truck called Late Nights
Puller/DD=04 LLY Reg Cab 2500HD,EFILive'd,Built Tranny and a fe fuel upgrades!
Business Truck
06 LBZ 2500 CC SB SRW,EFILive'd and a Built Tranny
DD/Beat Around
03 5.3L 1500 EC SB,Hypertech,Upgraded Tranny,Exhaust and CAI
Economy Saver
02 VW Jetta TDI,Stock for now but looking at a Chip,Nozzles and CAI!
tricycles = teaching childern from a early age that front wheel drive sucks  |