It is a 3" pipe. Get whatever is cheaper.

 

if performance is equal, save the cash

 

question for you: are you running a test pipe, or HFC, or cat? reason I ask is because I'm going to be rolling a Cobb dp and test pipe with invidia n1 cbe. I'd like to compare the way the cars sound. if only the dp's are different, I'd be curious to see of there's much tonal diff at all.

 

I have the Perrin 3inch downpipe.. I really like it.. The Quality looks of the Downpipe is very Good Good Luck!!

 

Perrin downpipe that was installed by a vendor before in my car hit's chasis bracket so cannot verify if fitment is an issue but a spacer my solve the problem. On the other hand, Cobb downpipe if not propery installed may hit the oil pan or chasis bracket as well. Both have excellent quality so it's a matter of personal preference.. I changed my set-up so I my used ceramic coated Cobb is up for grabs. Cobb dowpipe anyone?

 

I have noticed that cobb has parts and works on all types of performance cars like subies and 350z's and stuff... Perrin seems to do the same but i see alot more perrin stuff for the evo then cobb... cobb really only has basic things like downpipes and things and perrin has more depth in there performance parts for the evo... just IMO!

 

from the sound of things it really comes down to whether I want to run a HFC or Test pipe.... hmmm no emissions sniffer in NH but low-key sound is important thats why I am hesitant of a test pipe. Thats why I went with the Perrin CBE. Worse comes to worse can you bolt up the stock cat to an aftermarket DP/CBE and have it fit come inspection time?

 

Helix or megan best bang for your buck.

I have a helix on mine and no fitment or quality issues whatsoever. 99 bucks POW!

 

Your decision to run a test pipe or hfc shouldn't have any impact on your choice of dp. you may run whichever you choose, hfc or tp and either will bolt right up to whatever choice dp you get. really man, they are so close to the same that it came down price for me. getting both tp and dp for right around 2 bills was a no brainer. were they not liquidating the parts you'd pay a bit more and I'd be telling you to go Perrin. bottom line, you'll do well either way, so why not go the easiest on your wallet when facing a decision like this?

 

Just picked up a Cobb DP. $145 shipped, no tax (out of state)... Not to shabby

 

the megan dp is not 100 percent ss. the first part isn't at the bend. I dont know how relevant that is to reliability or performance but its priced well. I like the cobb since it has a low decibel rating for street use and is a full 3" ss.

 

Whatever you choose, just make sure that it clears your ACD as not many manufacturers make downpipes for the 05/06 Evos with ACD. Hence all the threads about fitment issues because people are buying DP's for the 2003-2004 non ACD.

 

my megan dp was pretty good quality but my ams downpipe fits much better

 

does anyone know if the cobb 3" dp fits evo 9? i wonder if it does since its 145 off of map right now

 

I have tried contacting them via their website to confirm it will clear the ACD. Haven't heard a response. I was also trying to get a full cobb turbo back exhaust from them for months with no luck and no responses. Just ended up giving up due to lack of customer support.