Ron, youd have a real hard time getting a 5" downpipe to fit. That being said, I had to modify my 4" downpipe when I installed my 4" exhaust. I have personally never seen a 5"' exhaust with a 5" downpipe.

 

So are there any benefits in having a 5" exhaust over a 4" if the downpipe is the same size?
I'm thinking the flow would be the same considering that it's going through the same pipe.
Just thinking out loud here.

 

I think for most guys below 550 hp, the 4" dp works better because it will allow the air to flow faster than a 5" dp. The 5" flows more air but at a slower speed thus not helping the cause. 5" is not needed until the 550hp mark I believe. Most guys who run a 5" run it for the deep and loud ROAR it produces and soon I hope to be one of those guys.

Jamie

 

Someone correct me if I'm wrong, but I was under the impression that u wasnt able to run a 5" downpipe till the 3rd generation trucks, and even then it seems hard to find a 5" exhaust system that actually sells a true 5" downpipe.

 

Will it really flow more air if the downpipe is only 4"

 

apparantely it does. I dont have a 5" so I couldnt tell you from personal experience. But many of the Big Boys run 5" - there must be a reason why (other than just looking cool, which is why I want one)

 

Yeah, that is the kit that bigBRUNO4 purchased.....I should know because I was the one who helped him install it on his rig

Pretty nice system for the money, but like he stated if you want loud then save yourself some money & get it without the muffler......

HUMP

 

well I have a full 5in system even a 5in DP well ecept the spot where we had to dent it to clear the bell housing

 

Yes, Its called scavenging. Theoreticaly, when going from a smaller to larger pipe the pressure will drop in the larger pipe "sucking" more exhaust from the 4 inch pipe, this is all in theory of course, real world can always be different.

 

5" downpipe fits just fine on a 2nd gen

 

My bad - thankls guys.

I have to massage my 4" downpipe with a ball pein hammer - whats up with that?

 

poorly designed?

building your own, a 5" downpipe is no biggie... it's unecessary IMHO, but it'll fit

 

Thinkin' about going to a 5" straight pipe once I get the gauges on, #5 plate installed, and 181 delivery valves.

Is the concern with going to 5" boost building? I would think bigger would help EGTs, though. The louder/deeper roar is what I want most. I hear 'em going by all the time.

 

Yeah, I should bought the 4" from the Ripper instead of Warpspeed.

 

Where abouts is rip rook located? I think i am going to go with his 5" aluminized , or the 5"SS from motoblue.