I have two questions.....one, I've heard of people removing the resonator to give the Legacy a nice little growl. What's the best way to do this, remove the resonator and replace it with straight piping?

 

2nd...I've been looking for a cold air intake but all I can find are intakes for 06 Legacys....anyone know if that will fit my 08 Legacy?

 

 

Cheers!

Not crazy about your warrenty or passing inspection?

 

 

Resonators are long gone, you are talking about replacing the muffler.

 

 

 

nipper

Warranty is already up. haha

 

Why would doing those things cause it to not pass inspection?

 

I'm just looking for a 15-20 HP gain...any ideas?

 

Cheers!

Depending upon where you live, modifying the exhaust system is against the law. Some places dont care, others use an inspection mirror to check the exhaust system

 

Generally ricers do this to thier hondas.

 

nipper

So, any suggestions for a quick 20 HP gain?

An exhaust tin can wont do it, and anyone who guarentees you a 20 HP gain out of a box is taking your money.

 

Modern cars are fairly peaked out. They breath effeciently, they last many rouble free miles, and get the best mpg they can for all around performance.

 

There are things you can do for a quicker throttle response (which is NOT a HP gain like most sites say).

 

One is lightened pullies.

 

A high flow cat doesnt work unless you are doing cams etc to take advantage of it.

 

You already have a cold air intake (as do almost any modern car). You can clean it up, and if you never intend to take your car into water of any great depth (most engine damage from sucking in water comes from puddles on paved roads) you can get rid of the snorkus and get a free-er breathing system, The intake air filter sits in the right front fender rather low. The subaru sinus is designed to keep the engine from digesting water.

 

not much more beyond that for a normally asperated subaru.

 

nipper

Hmmm...I'll send you a pic of something...wondering if you could tell me what it is and what it does.

What is that thing??

 

Thats part of the snorkus. There are odd cavities like that to tune the sound of the engine to meet federal noise standards.

 

Thinks of it as a sinus cavity.

It seems that Guinness133 is talking about an intake (not exhaust) ''resonator'' (silencer). That part not only reduces noise, but it also minimizes intake air turbulence that can occur at certain engine RPMs. Eliminating it can therefore cause air metering to be inaccurate under some conditions, causing other problems.

Ah ok hes talking the snorkus end.

so, then I'm guessing it's not a good idea to remove that and just put straight piping there?

 

just looking to gain a few extra horses somehow. Thanx guys!

so, then I'm guessing it's not a good idea to remove that and just put straight piping there?

I'm sure that there are people who'll tell you they gained 5 WHP or so by replumbing the intake, but it doesn't come without consequences.

 

 

just looking to gain a few extra horses somehow. Thanx guys!

As Nipper already mentioned, the cars are pretty well engineered to get what performance that can be had out of the engine and still have it be reliable, etc. I'm not going to suggest that Subaru (or any other manufacturer's) engineers build perfectly efficient cars. One of the reasons that some companies participate in racing programs and/or research at universities is that they sometimes learn a new trick or two. However, engineers tend to be aware of what aftermarket companies are doing, so if it were cheap and easy to get the 15-20 HP you're seeking, it would have likely been incorporated into the design.