Downpipe Help

[4G63dsmpwr]

I currently have the stock exhuast except for a 3" Buschur SS Cat-Backon my 90 AWD.

Now, I have a few extra bucks, and would like to finish off the exhuast. I have noticed there are a few different ways to do this:

1) BR 3" SS Test Pipe($60)
BR 3" SS DownPipe ($330)
Lancer EVO O2 Housing ($175)
Total: $565 SHIPPED

2) RNR 1g; External dump; Stainless Steel 3" o2 Eliminator Downpipe and Eliminate Cat.
Total: $500 SHIPPED

3) Authority Stainless DSM Downpipe - 1G DSM 90-94:

http://www.dsmparts.com/customer/product.php?productid=258&cat=89&page=1

"Pipe is 3" throughout the piping, it necks down right at the end to 2.5" to fit with the stock o2 housing and the exhaust"

^ Does the Buschur Racing pipe do this...? Why only $180? Ok so... $210 shipped for that DP, $60 for TP, and $175 for O2

Total:$455 SHIPPED

Which route is best flowing? Money is tight, the more I can save, the more towards other mods. I don't want to sacrifice performance in anyway. Would like to be in mid-12s someday, but I do no want to get a 2.5", press-bent, or mild steel system... Must be 3" SS, and mandrel bends.

Thanks!!

 

[Spln_Hrd]

get the rnr, my o2 housing is 3 inches. thats friggin huge. plus rnr has good prices.

also i would never buy a downpipe that necks down to 2.5 inches

 

[4G63dsmpwr]

Alright, cool thats what I was thinking...

When you bolted the pipe up, did you notice a difference?

And also, do you have the external or internal?

Thanks!

 

[Endz0r]

i have the internal dump. i noticed a huge increase in power. (rnr) the only problem is the pipe gets in the way of the oil filter, and it's a pain to get it off.

 

[4G63dsmpwr]

That kind of sucks about the oil filter...

How do you get the filter off?

Thanks!