diesel dude
Posting Guru
Joined: May 2004
Posts: 1,414
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From: stoneboro, pa
Originally Posted by PSD6litre40
on 2003 model year engines you must have a DP with a resonator or you will experience high pitched TURBO noise. The 2004 MY engines have a redesigned "quieter" Turbo.
FTE Leadership Emeritus
Joined: Jan 2003
Posts: 161,999
Likes: 75
From: 3rd Rock
Originally Posted by jasfaa
I called Banks and forget what I stated. They now make a downpipe for the '04 and they also stated that they were not aware of any issues of removing the CAT except being illegal. They, however, stated that this is not advised. (I think they have to say that) 
an issue that is!
Postmaster
Joined: Aug 2003
Posts: 4,483
Likes: 2
From: Central Texas
Originally Posted by bighoss550
03s have a really loud turbo scream w/o the muffler or cat! my 550 didnt have one(49 st. legal) anrd i put straight pipe in place of muffler. MAN it screams! sounds like a shop vac on steroids till 2600rpm! also "magnason/moss act states that they cant void your warranty for replacment of air filter w/ aftermarket, but i bet they can if u change the whole system like w/ ur airaid
Senior User
Joined: Nov 2003
Posts: 284
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From: WV
Originally Posted by bighoss550
03s have a really loud turbo scream w/o the muffler or cat! my 550 didnt have one(49 st. legal) anrd i put straight pipe in place of muffler. MAN it screams! sounds like a shop vac on steroids till 2600rpm! also "magnason/moss act states that they cant void your warranty for replacment of air filter w/ aftermarket, but i bet they can if u change the whole system like w/ ur airaid
"sounds like a shop vac on steroids till 2600rpm"
LOL!!!!! Good 1!
PSDboy
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