Gutting an OEM Lib GT muffler for maximum airflow - 2009

[cruisn]

<snip>but for the original price outlayed, id rather have something shiny or with a name to justify the cost.

And those requirements mean $400 ebay polished cannons. Not my cup of tea, but it's not my car or money.

Oh, I cant stand cannons.

As I said, I can definitely understand the intention of this mod and a thumbs up to you. But for $400 for stock mufflers or $500 for some proper HKS JDM aftermarket ones, I know what I choose.

[cpitts]

As I said, I can definitely understand the intention of this mod and a thumbs up to you. But for $400 for stock mufflers or $500 for some proper HKS JDM aftermarket ones, I know what I choose.

Given that Phatt did a run of 'cheap' mufflers (as claimed by many) for $800 per set, where after-market pairs (2 muffls on GT/GTB's) you're staring down the barrel of $1-2000 range for after market mufflers! That's a lot of money for 2 basic cans. Which is what sent me down this path in the first place.

[Arith]

That's a lot of money for 2 basic cans. Which is what sent me down this path in the first place.

Yes, but given that Gen IV's have been around a long time now, used/spare stock mufflers should be readily available. In fact, didn't you ask for spare mufflers and a centre pipe to experiment with?

I'm just pointing out that for a Gen V owner, the car is too new to have used parts yet. And since this mod is irreversible, unless the owner is a tw*t and leaves the mufflers on for the next owner without telling them, there are few options if the owner wanted to revert back to stock for whatever reason. They would probably have to resort to buying stock mufflers from the dealer which will cost the same if not more than aftermarket.

But like you said, the car belongs to the respective owner, and they can do whatever they want to it.

[coyote]

That's a rather biased comment based on nothing more than your imagination.

In fact, it'll let you easily max out the standard turbo and a VF52 without any issues

Oh, the ironing to have those two statements in the one post.

[cpitts]

That's a rather biased comment based on nothing more than your imagination.

In fact, it'll let you easily max out the standard turbo and a VF52 without any issues

Oh, the ironing to have those two statements in the one post.

*sigh* It's been a while since these entertaining post sequences have ocurred. Should we continue this in another thread?

I do like the way you've joined the 2 comments tho, different context, but creative combining.

I brief tho:
Do I have a dyno of a car with a gutted muffler maxing out a VF46 or 52? Answer -> No. I will soon though.
Do I have a dyno of a car exceeding power levels achieved by the VF46/52? Answer -> Yes (VF46) and No (VF52)
What is the VF52 claim based on? Answer -> Air flow limitations of the pipe diameters of the mufflers. They're basically straight through pipes, that's where the limitation is. The ~200kW ATW (on their dyno) figure is a limitation that was advised to me by AVO during the last tuning of my WRX with the same muffler setup. I trust their knowledge on these things, it's their job.

[cruisn]

Given that Phatt did a run of 'cheap' mufflers (as claimed by many) for $800 per set, where after-market pairs (2 muffls on GT/GTB's) you're staring down the barrel of $1-2000 range for after market mufflers! That's a lot of money for 2 basic cans. Which is what sent me down this path in the first place.

Look outside Australia for "cheap" options.

I picked up these HKS legamax mufflers for $540 bought and shipped through Import Monster. 10K kms use, direct bolt on. I know if i change my mind with them (I doubt it) I will easily get that price again. I personally wouldnt pay more than that though for two cans either.

[blacknwhite]

Well I dont think that is going to cut much ice now, sounds like for whatever reason Vin is goooorne, for what reason we dont know, but if he was giving advice like that , no matter how correct or valid, as a representative of Subaru you could see why the head honcho's would not be best pleased

That's a rather biased comment based on nothing more than your imagination.

I work on the premis that if you modify your car, you take your warranty into your own hands. Personally, I'd be a LOT more concerend if I saw a full 3" exhaust on a Subaru rather than a set of custom OEM mufflers. Mufflers are so insignificant on Subaru's on their own that they rate of little concern on a service front. Combine them with other mods though and it's a different story, and then it's all about the diameter of the pipe going in and going out and the pressure chambers inside it that determines its performance. A modified OEM muffler is much closer to 'standard' in the eyes of service than an after market item.

The thing that people seem to be constantly missing with this mod is that it's a compromise mod. It's invisible to the naked eye (stock mufflers), it's quiet and it gives you maximum airflow from the stock mufflers. In fact, it'll let you easily max out the standard turbo and a VF52 without any issues, but ~200kW ATW will be the limit for these things and that's beyond most people's daily routine anyway.

Sorry ,not that it matters diddly but I cannot see what I said is a biased comment on my imagination but each to their own

[BYE911]

Oh you have got to love forums for the freedom of opinion.
Thank you everyone for your comments in relation to my original post.
I have read them all and have finally decided to only cut off the original tips and replace them with something that looks a little better to my eye( bigger in diameter for starters).
In the new year I will shop around for a pair of second hand standard mufflers from 07 on wards as I think that from here on upwards they may be one and the same or similar (to be confirmed).
I will gut them and have my original ones for backup in case it doesn't work out to my liking.
I will advise the spring information for the person who asked this week.
Wait until I get to the air box and ducting which looks absolutely crap in these things.
I have owned V8's for over 30 years so this is a little new to me, please bear with me.

[Arith]

I will shop around for a pair of second hand standard mufflers from 07 on wards as I think that from here on upwards they may be one and the same or similar (to be confirmed).

Oh! Where did you hear that?

[cpitts]

In the new year I will shop around for a pair of second hand standard mufflers from 07 on wards as I think that from here on upwards they may be one and the same or similar (to be confirmed).

I've used 05 mufflers on my MY07 from a GT and also a '05 3RB, so the bolt up will most likely be the same with the key differences being what's in the can and also the tip size and shape. Given that you're looking to go the axe on the tips anyway, that's probably the lesser part of your concern.

Good luck with the hunt.

[smythie]

So is the car a MY10 Gen 5 or a MY10 Gen 4? If it's a Gen 4, the 07 exhausts will fit fine. If it's a Gen 5, I'd be surprised if 07 exhaust parts fit

[Wasbxt]

Surely there's no shuch thing as an MY10 Gen 4!?!?!?

[cpitts]

Given the new platform code, engine format and significant body change, surely they've classed it as a new generation car. Then again, the muffler component could well be basically the same with different tip length and possibly hanger location and that's about it. Anyone got an exhaust diagram from a manual or similar?

[smythie]

Surely there's no shuch thing as an MY10 Gen 4!?!?!?

I don't know. There might have been some Gen 4 cars built after June 2009 which IMO would make them MY10 cars.

By the sounds of your comment though I'm guessing yours is a Gen 5. With that in mind I'd doubt the mufflers from a 2007 would easily fit your car. They *may* fit but will require cutting and shutting I reckon. Not impossible but not particularly practical

[BYE911]

Thank you for the reply
It all sounds good (pardon the pun)now I just need to decide if I have the guts too do it.
If it doesn't work out quite right i will be in the poo big time with my wife, not too mention the cost for new mufflers.
It was hard enough getting it lowered, far less this mod.
If i do it, I will let you know how it turned out.

Sorry to threadjack but what springs did you put in?
Have my wagon coming in the next few weeks and really want it lowered before delivery......BTW, is yours a wagon or sedan?

Sorry to take so long to reply but the last few days have been pretty hectic.
The car is a sedan.
It was done by Pedders using there Sports Ryder Suspension.
Front: 2672 Spring number
Rear: 2657 Spring Number
It has really changed the look of the car for the better, and still rides really well.