ok guys....i got the cash but i can't decide...my head is hurting...i searched and found alot of info on both headers...now i can't decide on which to get myself...
bisimoto or a an-r for this application...please don't flame...saying that it's been cover many time...this is for my app...

here's wut it'll be going on...
stock jdm gsr block with ctr piston
pnp gsr head with crower 403 cams..
head milled .30 thousand..
itr tranny..
195 whp 128 tq so far was regular dc sport header....
compression 280 across...

 

They are both made by the same guy so craftsmanship/quality is going to be the same...

The Bisimoto header will be better performance wise IMO due to the fact that Bisi opts to go with a true Burns 4-1 merge collector for the Bisimoto header... The primary routing out the Bisimoto seems to be a bit different as well...

 

if the an-r is a stamped collector, that will suck big time

 

I am leaning towards the An-r. Here is my take on it, the bisimoto header is around $200 more but has had a lot of research put into (from what I have read). The An-r on the other hand I haven't heard to much about the R&D for it, other than the equal length runners. If I could afford any header it would be a Bisimoto or SMSP or DTR (since he is a local kid and has made some good stuff). BUT since I cannot afford any header I want it is an AN-R for me or DTR since he is local.

my .02

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bob-DC2 &raquo;</TD></TR><TR><TD CLASS="quote">if the an-r is a stamped collector, that will suck big time</TD></TR></TABLE>

AN-R/Prospeed gives you the option of the 4-1 merge or stamp collector

 

is there a great difference between the 2? Can someone post pics of both types.

 

Merge is a lot better, its an actuall controlled merge of the 4 primaries... the stamp collector, or "street" collecotor is a basic dump for all 4 prmiaries to collect into one area...

Here's a good cutaway view of a merge collector from Burns Stainless...



And in this kit you can see a "stamp" collector, which is made from a single piece of tubing with no welding invloved...

 

just by looking at the pic the true merge collector looks waaayyyyy better flowing. Cool thanks.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Twenty36_1 &raquo;</TD></TR><TR><TD CLASS="quote">just by looking at the pic the true merge collector looks waaayyyyy better flowing. Cool thanks.</TD></TR></TABLE>

Burns is the best in the business...

I wouldnt deal with anyone else for merge collectors

 

Pony up for an SMSP.

 

http://www.bisimoto.com/wst_page6.html

 

i won't be getting the stamp collector for sure...
an-r also offers a merge collector also....but it cost like 200 bucks more i belive...bisimoto already has the merge collector...

c..this is why i can't decide...bisimoto $689(exospeed.com)...anr compact version w/merge collector $730(from an-r.com)...but..i guess bismoto it is...for the money and for the name...thanks for all the input...

 

both of those headers are the same length and ANR also offers a merge collector
on a slightly built say... B18 a merge will make about 3 to 5 more poneys
be careful what you buy just becouse of a fancy name

KEEP THE LIPSTICK OFF DIPSTICK