how would a dc header flow with a modified 2.5" collector and a 2 1/4" test pipe and 2 1/4" piping? would it bottleneck where the header meets up with the test pipe? how big is the dc 4-2-1 collector? would it be better to have a 2 1/4" collector? tia!

edit: how much would a muffler shop typically charge to modify the collector?

peace!


[Modified by ophdeheezy, 11:27 PM 3/3/2003]

 

It wouldn't be optimal. I'd get a 2.5'' test pipe or cat made.

 

The OD of the DC collector is 2.25"

 

The DC collector is 2" OD. If you are going to run the 2-1/4" test pipe and cat pipe just mod the header with a 2-1/4" collector.

 

how exactly are you gonna mod a dc collector to 2.5"?

 

I did this mod and it worked really well. To do this you need to cut the last Merge collector (on the B pipe) back to about its widest point and weld on a 2 12" pipe and flex. SMSP has a lot more experience with headers so I might suggest you take his suggestion of only going 2 1/4" piping off of the collector. 2 1/2" worked killer for me, but He has more Knowledge.

 

hmmmm....... I have an email from a DC sport tech stating that the OD of their collector is 2.25"

edit: that was in response to my inquire about the 93-96 Vtec prelude header


[Modified by Tru_Playah, 7:43 PM 3/4/2003]

 

The DC Header I have was measured at 1.9" ID. 93-96 stainless VTEC header.

 

Yes.