4 or 5 inch exh.

[Big_Mac]

I ran a 5" stright pipe on my 99 and I loved it...nice deep tone to it...

 

[B N S slammer]

i always thought 5 was overkill.. 4 inch sounded great with my single charger with twins my truck isquited down quite a bit... plus if u ever wanna pull ur transmission 5 inch will be in the way but with 4 inch u can work around it

 

[BgBlDodge]

Y'all do realize that 900hp has been done on 4" multiple times right?