Prodrive Axleback vs Borla Hush Catback
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Prodrive Axleback vs Borla Hush Catback
I'm looking for a quieter exhaust system, and I've limited my search down to the prodrive and the borla hush based on forum searching and reading people's opinions on various mufflers. I plan on getting an up-pipe and downpipe to complement whatever I choose, as well as getting a cobb reflash to finish it all off. I'll likely be getting other minor things along the way like IC hoses, but I don't think this'll require a re-reflash anyways...
What I want to know though, are the dyno results from anybody who has similar setups to the ones I described. I'm thinking the catback will produce more power since it also replaces the rear exhaust pipe and resonator. Cobb's stage 2 reflash dyno specifies that a turboback will produce 280hp. How close to this figure should I expect with either of my aforementioned setups. I know neither the prodrive or borla are the most efficient exhausts I can get, but I hope I don't fall too short of Cobb's figures.
One last question, does keeping the stock rear exhaust/resonator help keep down noise levels or nasty exhaust fumes?
What I want to know though, are the dyno results from anybody who has similar setups to the ones I described. I'm thinking the catback will produce more power since it also replaces the rear exhaust pipe and resonator. Cobb's stage 2 reflash dyno specifies that a turboback will produce 280hp. How close to this figure should I expect with either of my aforementioned setups. I know neither the prodrive or borla are the most efficient exhausts I can get, but I hope I don't fall too short of Cobb's figures.
One last question, does keeping the stock rear exhaust/resonator help keep down noise levels or nasty exhaust fumes?
Last edited by Ray; Jan 18, 2004 at 11:37 AM.
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Joined: Sep 2003
Posts: 168
From: Stoughton, MA
Car Info: Sonic Yellow WRX
Go with the borla hush because it maintains the 3" throughout. The prodrive bottlenecks to a 2.5.
A member with a vf24 noticed he lost 10hp after installing a prodrive axelback compared to a more free flowing (Apexi GT) exhaust.
A member with a vf24 noticed he lost 10hp after installing a prodrive axelback compared to a more free flowing (Apexi GT) exhaust.
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Joined: Nov 2002
Posts: 820
From: San Jose-near milpitas
Car Info: 03 Wrx black sedan + 2013 BRZ
I have the boral system on my car, I really like it! I posted up the dyno results in this forum, just do a search and you hsould be able to find the link. The system is really quiet at normal speeds and, as others have said, it growls nicely at WOT. Although I think one may have to get some custom work done to get the borla to fit onto an after market dp.
Link for the dyno results:
https://www.i-club.com/forums/showth...ighlight=borla
Jason
Link for the dyno results:
https://www.i-club.com/forums/showth...ighlight=borla
Jason
Last edited by Wrxneffect; Jan 19, 2004 at 01:09 PM.
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Joined: Aug 2003
Posts: 37
From: 02474
Car Info: WRX Shooting Brake
Yeah, I'm the guy that lost 10hp going from an Apexi catback to a Prodrive axleback. The Apexi was way too loud with my Borla header so I put my old Prodrive back on. I gotta get that power-robber off my car asap and get a custom quiet turbo-back, or perhaps a Borla Hush + custom midpipe.
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Apart from what I previously listed: up-pipe, turboback, IC hoses, and Cobb reflash, I don't think I'll be doing any more power mods to my car. But since I'm only going to go so far with my power mods, I want as much power out of what I do get, but with minimal noise levels, since I don't want to be drawing attention to a catless car.
And a quick question, is the stock rear exhaust/resonator also rather restrictive? I'm thinking that it is, but does it noticeably keep down exhaust fumes? I also don't want an overly smelly car, which going catless is bound to cause.
And a quick question, is the stock rear exhaust/resonator also rather restrictive? I'm thinking that it is, but does it noticeably keep down exhaust fumes? I also don't want an overly smelly car, which going catless is bound to cause.
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Joined: Sep 2003
Posts: 168
From: Stoughton, MA
Car Info: Sonic Yellow WRX
It's only really smelly upon initial cold start up. Then as the car warms up and you drive around a little the smell is less offensive but still present.
I've idled infront of at least three cop cars and no one said a thing. Supposedly, one can smell a catless car vs a generally smelly car, so maybe i got lucky.
I'm not sure on the resonator and smells, but i am positive that it does it's job keeping noise levels down. I had a magnaflow welded on to the stock axel back. then i added a helix downpipe which got ride of two cats and the decible level out of the magnaflow stayed almost identicle, not noticibly louder, which i hoped and intended it to be. I picked up the single tip bosal catback and it's definatly louder!
I've idled infront of at least three cop cars and no one said a thing. Supposedly, one can smell a catless car vs a generally smelly car, so maybe i got lucky.
I'm not sure on the resonator and smells, but i am positive that it does it's job keeping noise levels down. I had a magnaflow welded on to the stock axel back. then i added a helix downpipe which got ride of two cats and the decible level out of the magnaflow stayed almost identicle, not noticibly louder, which i hoped and intended it to be. I picked up the single tip bosal catback and it's definatly louder!
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Joined: Aug 2003
Posts: 37
From: 02474
Car Info: WRX Shooting Brake
Troyboy, the Borla header added some power, but I also got a reflash the day that it was installed so it is hard to know for sure. It made the car louder, but in a good way, increasing and evening out the "blub blub blub blub." I can feel the throbs in the cockpit.
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iTrader: (7)
Joined: Nov 2002
Posts: 820
From: San Jose-near milpitas
Car Info: 03 Wrx black sedan + 2013 BRZ
Originally posted by IcemanSS454
I am also considering both cat-backs. Are both of them direct bolt ons?
I am also considering both cat-backs. Are both of them direct bolt ons?
Jason
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Joined: Sep 2003
Posts: 599
From: Fremont, CA
Car Info: was 05 WRX Wagon
I have the Borla Hush courtesy of MPJ Performance and highly recommend it. The Hush system is a bolt on exhaust and was a snap to install. I love the fact that it looks near stock so cops don't give me a second look. The exhaust is not too obtrusive as far as sound goes, a nice rumble all the way throught the powerband.
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Posts: 6,453
From: San Jose
Car Info: Evo X, 04 STI, 335i, Fit
We have found the Borla Hush system to be a popular system for folks wanting to get some power but not add to much noise!
If anyone on this thread wants one we would be happy to give a I-Club member a deal!
Mike
(510) 487-4447
www.mpjperformance.com
www.gb-motorsports.com
If anyone on this thread wants one we would be happy to give a I-Club member a deal!
Mike
(510) 487-4447
www.mpjperformance.com
www.gb-motorsports.com