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Old 09-21-2007, 04:24 AM   #1
CUbaru07
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Question Want a little more power, whats the best way to do it?

Title says it all, i have an 07 2.5i, and i want a little more power. I want to know what you guys recommend, i want something that wont void my warranty and wont set me back thousands of dollars... Ive looked into cold air intake and exhaust and stuff like that...but i could only find a handful of things for the non-turbo imprezas. If you guys have any suggestions or websites where i could get more info and ideas it will be greatly appreciated!
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Old 09-21-2007, 07:46 AM   #2
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www.subarugenuineparts.com

I believe SPT accessories won't void your warranty if installed by Subaru Technicians (correct me if im wrong). Other brands (such as COBB, INJEN, Borla, etc) will void your warranty.
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Old 09-21-2007, 08:33 AM   #3
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except there aren't any SPT "power" mods for our cars...so you'd need to go with a CAI, CBE...etc that are 3rd party
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Old 09-21-2007, 08:54 AM   #4
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SPT does offer a SRI with heatshield and a catback exhaust on their website last time I checked. Go to the dealer and ask them what you can do without voiding the warranty...
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Old 09-21-2007, 10:05 AM   #5
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Quote:
Originally Posted by tludwins539 View Post
SPT does offer a SRI with heatshield and a catback exhaust on their website last time I checked. Go to the dealer and ask them what you can do without voiding the warranty...
Even SPT is one of the best... or shall I say safest intakes out there. As for the exhaust, I'm not sure about sound, but it will bring out the boxer rumble. Although, I think you have UL headers... but still, it will be a tad louder. It's the only way to go if you don't want to void warranties.
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Old 09-21-2007, 11:35 AM   #6
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the intake on that site for SPT is for a turbo...you'd have to fabricate an elbow to make it read the TB...

as for the exhaust none are for the 2006-2007 2.5i specifically...so if you are doing a CBE i'm not sure how they'd honor the warranty even if you were using an SPT part on the "wrong" car.

also the only warranties the intake and exhaust would void is if they are the actual cause of a problem...the car would still be under warranty for all other maintenance and such...**** they were willing to replace an axle boot i broke with an aftermarket suspension...but i don't trust their techs
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Old 09-21-2007, 11:47 AM   #7
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Quote:
Originally Posted by Spore View Post
www.subarugenuineparts.com

I believe SPT accessories won't void your warranty if installed by Subaru Technicians (correct me if im wrong). Other brands (such as COBB, INJEN, Borla, etc) will void your warranty.

no exhaust will void your warranty,i have a full exhaust (header,catless mid-pipe, cat back and Subaru still works on my car.

-justin

a CAI, and full exhaust will give you moderate power gains
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Old 09-21-2007, 12:04 PM   #8
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^^just to add in, that doesnt relate to all dealers and etc etc so be careful especially when removing the cats

eitherway the biggest difference that would be made with your car is with tuning, but if your worried about warranty your kinda out of luck
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Old 09-21-2007, 01:45 PM   #9
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Gaining power while remaining in the confines of your warranty is a mighty difficult task. It sort of depends on your dealer and how nit-picky they are. I personally sugguest sticking to really basic mods that can be interchanged easily in the event that your car needs some servicing. I personally am cutting my power modding short at the cat-less and intake. Not huge gains but they are easy enough to change out in the event work needs to be done.
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Old 09-21-2007, 02:15 PM   #10
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^now i know you hate me but whatever, how are you going about being catless and it being each to change? just because from what i remember the cats are in like your header for 07 so are you gonna gut them or have some other trick?
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Old 09-21-2007, 02:26 PM   #11
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don't remove your cats. Technically it's illegal (federal law says you or a shop can't tamper with the emissions equipment of your vehicle). Besides the very (emphasis on very) modest gains you'd get from a test pipe wouldn't be worth the extra hassle if you're just looking for a little more kick.

Get the exhaust first. Intake...I don't know about spending anything over $100 for a tube and cone filter but whatever. It's really simple enough to just get an ebay intake (dyno proven btw) and modify it to fit your car. It's very simple to do so.
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Old 09-21-2007, 02:30 PM   #12
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Quote:
Originally Posted by piker28 View Post
^now i know you hate me but whatever, how are you going about being catless and it being each to change? just because from what i remember the cats are in like your header for 07 so are you gonna gut them or have some other trick?
What makes you think I hate you Piker? Your a swell fellow Tri-Stater...Anyhow...When I talked about catless I guess I was referring to exhaust mods as a whole are generally easier to swap out than say dropping in some cobb cams or having serious engine work. Power modifications will more than likely void your warranty. I wouldn't put it past an a-hole at the stealership to claim that your performance part X you ordered from SPT caused such and such so you warranty is out the door.
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Old 09-21-2007, 04:13 PM   #13
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i remember from some thread way back when

anyway yea i hear what you mean but also dont forget its pretty easy for a mechanic to tell when something has been touched, thanks east coast salt ha

and although sometimes a spt wont void warranty they can find other ways to make your life hell. like at a dealer i was at a solara with trd supercharger came in and complaind of sludge buildup, we said ok warranty pull off the head and check, but you have to pay for removal and installation of the supercharger ha
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Old 09-21-2007, 04:26 PM   #14
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Quote:
Originally Posted by piker28 View Post
i remember from some thread way back when

anyway yea i hear what you mean but also dont forget its pretty easy for a mechanic to tell when something has been touched, thanks east coast salt ha

and although sometimes a spt wont void warranty they can find other ways to make your life hell. like at a dealer i was at a solara with trd supercharger came in and complaind of sludge buildup, we said ok warranty pull off the head and check, but you have to pay for removal and installation of the supercharger ha

I haven't complained about you in awhile and not nearly as much as other people have as a whole. But honestly what you say over the internet shouldn't make or break a person...so put er' there mate!

You are right that it may be easy to tell if things have been touched and even small mods like I described can end badly under certain conditions. Like a CAI sucking in water and hydrolocking...= / Basicly if you are concerned with your warranty avoid messing with your car simple as that. On the good side I don't think Cobb has made cams that fit 06+ so your not missing out on too much N/A power. (Someone correct me if I'm wrong but all I have seen have said up to MY05)

On a side note about dealerships voiding warranties I saw an ad for the Scion tC with all these factory approved parts that supposedly wouldnt void the warranty on it. They even had a supercharger...C'mon SPT or someone hook us up with non-warranty-voiding power!
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Old 09-21-2007, 05:57 PM   #15
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Quote:
Originally Posted by piker28 View Post
^^just to add in, that doesnt relate to all dealers and etc etc so be careful especially when removing the cats

eitherway the biggest difference that would be made with your car is with tuning, but if your worried about warranty your kinda out of luck
INDEED!!!
-justin
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Old 09-21-2007, 06:03 PM   #16
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Quote:
Originally Posted by KaptainKandy View Post
Gaining power while remaining in the confines of your warranty is a mighty difficult task. It sort of depends on your dealer and how nit-picky they are. I personally sugguest sticking to really basic mods that can be interchanged easily in the event that your car needs some servicing. I personally am cutting my power modding short at the cat-less and intake. Not huge gains but they are easy enough to change out in the event work needs to be done.

are you running a test pipe as well?
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Old 09-21-2007, 06:13 PM   #17
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I made a CAI intake using the stock piping and i had a custom cat back exhaust made by an exhaust shop that is easily removed and the stock one bolted back on if necessary. The catback gave me a tiny bit of lowend and the intake with cone filter added a little topend.

Nothing drastic mind you but did add a "little bit of power" as you say. well worth it in the fun factor.
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Old 09-21-2007, 07:46 PM   #18
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lightweight crank pulley
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Old 09-21-2007, 08:26 PM   #19
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trying not to void your warranty but modify the car to go a bit faster? hmmm . . . that's a bit tricky there.
I'd say for the time being, just add bolt ons. Easy install and uninstall if anything happens. Keep your stock parts incase you have to reinstall them back on.
ie: SRI or CAI / bolt on axelback or catback (i haven't seen any bolt on catbacks at the moment, only bolt-on axelbacks such as wrx and sti).

Light weight crank pulley works too. Light weight flywheel, but apparently you're not suppose to install both for some sort of electrical issues.

But being our cars at 173 hp crank, what'd you think it would be at the wheel? IIRC, another suby member dynoed his stock 2.5iwagon, and received about 123 whp stock.
If you add those mods, what kind of estimates do you think you'll get regarding hp increase? Probably not much. . .
But in the end, it's for fun factor and personal preference right?
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Old 09-21-2007, 08:43 PM   #20
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Unless i missed it, nobody really mentioned anything good about the warranty. IT IS ILLEGAL FOR A DEALERSHIP TO VOID YOUR WARRANTY FOR JUST HAVING AFTERMARKET PARTS. However, if they prove the part caused the problem, then you have to pay for it but even then it doesn't void the entire warranty. Also, if you have i/h/e or whatever and your struts go, you can take it in and have work done because it is impossible for them to say that power mods F-ed up your struts.

Now that is out of the way, whoever said a test pipe will not give any power is very mistaken. Besides forced induction, or cams, the test pipe will give you the most power (over intake, pulley, headers, ecu, catback) because the cat is extremely restrictive. If i were you, i'd do suspension mods because they truly are the most rewarding...throw some springs or coilovers on there with sway bars and tires and you're golden.
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Old 09-21-2007, 09:51 PM   #21
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but yet struts in MOST cases are a wear and tear item so youd prob be out of luck there anyway ha
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Old 09-21-2007, 10:08 PM   #22
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good point. I couldn't come up with a better example...
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Old 09-21-2007, 10:11 PM   #23
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yea i thought about it after i posted and was like ooo i think he meant just an example. Heres my thoughts on it warranty is worthless outside of my motor, trans, well drivetrain. Now yes you can put mods on and they can claim it caused the problem you could say no and yes they would go investigate.... but are you ready to be without the car for AWHILE and deal with the big debate between dealer soa you etc.

I dunno to me after like 5k miles if theres no issues to your car than i would never worry about it.
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Old 09-21-2007, 10:52 PM   #24
westy4990
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I have the stromung catback from boxer4racing and couldn't be happier. Took me 30 minutes to install. Bolts right up. Sounds great and might add a little bit.
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Old 09-21-2007, 10:57 PM   #25
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Would a piggyback on the ECU void it? I mean you can pop it out when brining it in(depending on make and model of PB) and you get your better curve and refinment. I don't have a new enough car to bother worrying about warreties! LOL. But I was under the impretion that any bolt on will not void the warrenty as long as you can prove it wasn't the bolt on. So CAI and CB are what I would go with first. Either route would cost you around $600 before any install or tuning. Free up the air flow or fine tune what's there both should be safe and noticable. Let me know if I"m right or wrong on the voiding state with bolt ons cause that's what I heard last.
-Gaddis
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