Aftermarket DP with Stock catback Help - Subaru WRX Forum
 
LinkBack Thread Tools Display Modes
#1 Old 03-23-2010, 12:14 AM
WRXtuners Member
 
Join Date: Jul 2009
Location: Washington
Posts: 6
cmcnamara is an unknown
Aftermarket DP with Stock catback Help

I want to know if anyone has an aftermarket dp with a stock catback. I have read that this is considered stage 2 but are the power gains as noticeable as a full turbo back. I am thinking about going catless dp for now as there is still a cat in the mid pipe and a resonator.

Has anyone done this? If so how much louder is the exhaust? Sounds clips maybe? Thanks for any help!
cmcnamara is offline  
Sponsored Links
Advertisement
 
#2 Old 03-23-2010, 06:49 AM
WRXtuners Member
 
man show's Avatar
 
Join Date: Apr 2007
Location: Maryland
Posts: 3,104
Images: 2
man show is a WRX expert worth listening to man show is a WRX expert worth listening to man show is a WRX expert worth listening to
There shouldn't be a cat in the midpipe - there should be two cats in the downpipe and one in the up pipe if you have an 02-05 WRX (06+ WRXs and all STi's come from the factory with catless up pipes). True, you'd still be considered stage 2 with an aftermarket downpipe, stage 2 ecu reflash, and stock cat back, but you'd see slightly higher gains with an aftermarket cat back since many of those utilize 3" piping and the stock cat back pipe is only about 2.25" in diameter.

John
07 WRX (Albins 5MT + Blouch 20G)
Jorge Carrillo Tuned (365 whp/340 wtq)
man show is offline  
#3 Old 03-25-2010, 10:16 PM
WRXtuners Member
 
cooperwrx's Avatar
 
Join Date: Sep 2008
Location: New Jersey
Posts: 68
cooperwrx is an unknown
a few months ago before i put my hks catback on i first put on a 3inch catless DP and i really didnt hear much of a difference. maybe alittle throatier when you reved it and alittle at higher rpms, but not to much.
cooperwrx is offline  
#4 Old 06-06-2010, 11:56 AM
Moderator
 
newtothegame's Avatar
 
Join Date: Dec 2006
Location: Maryland
Posts: 6,493
Images: 4
newtothegame is known to be trustworthy and helpful newtothegame is known to be trustworthy and helpful
Send a message via Yahoo to newtothegame
That last statement is true for 02-05 WRX. All STIs have catless uppipes, and 06+ WRXs have catless uppipes.

Joshua
"2007 WRX- PPG'd, 20G- Tim Bailey tuned
Stage 2 2005 WRX
Cobbtuning.com"
newtothegame is offline  
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On