if i mod my dc headers to 2.5 where do i get a flange, and does my exhuast have to be 2.5 ..???ive searched with no luck

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by lude_angel &raquo;</TD></TR><TR><TD CLASS="quote">if i mod my dc headers to 2.5 where do i get a flange, and does my exhuast have to be 2.5 ..???ive searched with no luck </TD></TR></TABLE>

I've been looking into this also.

Most people cut it off where the two pipes join, and put a 2.5" pipe their and weld it. Most people just make it straight through with a 2.5" collector and a 2.5" exhaust.

There have been other ideas I've thought about.

Stepped Secondaries
The DC has 1-5/8" (41.3mm) primaries and 1-3/4" (44.5mm) secondaries.
Instead of just chopping it off. I think that maybe stepping from 1-3/4" to 2" right after the bend under the oil pan, and then merging to a 2.5" collector. Stepped headers help with scavenging air by reducing reversion.

2 3/8" Collector w/ 2.5" Exhaust
There have been lots of talk about making the collector smaller than the exhaust pipe. This creates the Ventuli effect. If we put a 2.5" collector and wanted the Ventuli effect, we would need an exhaust bigger than 2.5" and for most all-motor applications, I think we would lose too much low end.

Combination of the FIRST TWO
What if we stepped it, used a 2 3/8" Collector w/ a 2.5" Exhaust?


Note: Hotshot / Hytec / SMSP / AN-R is not an option here in my case. Cops in California are always popping hood. When they see a DC Sports, they leave me alone. So with a modified collector, a DC Sports would pass their visual, and they won't know about the collector. I don't know why it's a big deal either, since it'll still pass smog (at least for 92 - 95 Preludes).

 

oic, someone should do a write up on it to answer all the questions that are yet to come
,like a how to,that would be sweet.

 

there isnt much of a how to because its not a DIY job. you just bring it to any muffler shop and tell them what you want and they should do it for you for $50+

 

http://kteller.com sells everything youll need

 

Can a 4th gen header fit on a 5th gen since they are both h22 engines, I know they are different versions of the H22 but I just thought mabye they could? Any help would be appreciated.

 

yes, but length of collector is different

 

could a muffler shop easily fix that or do you have to get a new collector?

 

exhaust/muffler shop should have everything u need