I have a 40 series delta flow Flowmaster on my 00 4.8L. Sounds great. PM and I'll send ya a sound clip of it.
__________________ ______________________________ 2000 Silverado 4.8L V8 (Converted from 4.3L V6)
Edelbrock Ceramic Coated Headers
K&N Fipk Gen. II
Superchips MAX Tuner
Flowmaster 40 Series DF w/3" pipe
Poweraid TB Spacer
Flex-a-lite Electric Fans
3.73 gears w/Eaton posi
Whipple on hold
And those are just the performance mods...