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Old 01-23-2006, 04:29 PM   #1
Wylde Horses
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Default FS: axlebacks

OEM SPT performance axleback (identical to STI Genome without the sticker on the tip) SOLD

Prodrive roundtip axleback SOLD
- an excellent soundclip for the comparison between stock and a prodrive can be found here.

Local pickup only, thanks.
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Last edited by Wylde Horses; 02-04-2006 at 10:13 PM.
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Old 01-23-2006, 04:42 PM   #2
Lantec
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Do they really make a difference in performance?
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Old 01-23-2006, 04:45 PM   #3
Tricky
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Can I interest you in a trade for a TurboXS RFL Ti?
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Old 01-23-2006, 04:50 PM   #4
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Performance wise, I wouldn’t say there is much of a difference. You’d really have to do a before and after dyno to see if there is a gain. If the rest of your exhaust is catless, then I wouldn’t be surprised if you saw a few horsepower, nothing earth-shattering though.

And sorry, no trades… unless you have a stromung dual tip.
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Old 01-23-2006, 04:58 PM   #5
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Quote:
Originally Posted by Wylde Horses
Performance wise, I wouldn’t say there is much of a difference. You’d really have to do a before and after dyno to see if there is a gain. If the rest of your exhaust is catless, then I wouldn’t be surprised if you saw a few horsepower, nothing earth-shattering though.

And sorry, no trades… unless you have a stromung dual tip.

Hmm.. cause I'm kinda looking for an exhaust... I really like the boxer sound but I don't want anything that just keeps droning and gets really loud...
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Old 01-23-2006, 05:08 PM   #6
Wylde Horses
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Quote:
Originally Posted by Lantec
Hmm.. cause I'm kinda looking for an exhaust... I really like the boxer sound but I don't want anything that just keeps droning and gets really loud...
Both of these are really quiet. Personally I found the SPT sorta Genome to be slightly quieter then even the Prodrive which is generally accepted to be the quietest aftermarket axleback. Basically depends what kinda look you are looking for.
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Old 01-23-2006, 05:09 PM   #7
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Quote:
Originally Posted by Wylde Horses
Both of these are really quiet. Personally I found the SPT sorta Genome to be slightly quieter then even the Prodrive which is generally accepted to be the quietest aftermarket axleback. Basically depends what kinda look you are looking for.

Any sound clips on how the Prodrive sounds?? I found a video of the STi Genome on google video and I really like it
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Old 01-23-2006, 05:13 PM   #8
Tricky
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Ah well, worth a shot. Good luck on the sale!
Prodrives are niiiiiice.
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Old 01-23-2006, 05:16 PM   #9
Wylde Horses
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Quote:
Originally Posted by Lantec
Any sound clips on how the Prodrive sounds?? I found a video of the STi Genome on google video and I really like it
I have a movie/soundclip of the Prodrive at home – PM me your email address and I’ll send it to you when I get home. If you do a search, there are a few in the member’s gallery and the car part reviews section.
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Old 01-23-2006, 08:13 PM   #10
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I have the JDM STi genome on my car and it sounds pretty good, no droning at all. I remember there was a link to the Japanese Subaru website which has clips of both stock and Genome on a STi. Prodrive is great too! Small tip though
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Old 01-23-2006, 08:51 PM   #11
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Quote:
Originally Posted by chopchop
I have the JDM STi genome on my car and it sounds pretty good, no droning at all. I remember there was a link to the Japanese Subaru website which has clips of both stock and Genome on a STi. Prodrive is great too! Small tip though

Exactly why I like it. So it looks almost stock

These are direct bolt ons right? no need to get extra piping?
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Old 01-23-2006, 10:52 PM   #12
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What diameter is the piping on the SPT axle back, and how much use has it had?

I just put on a full exhaust on my RS, but the Stromung catback I bought is stupidly loud and after ~200km I can't take it any more
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Old 01-23-2006, 11:31 PM   #13
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Quote:
Originally Posted by Wylde Horses
I have a movie/soundclip of the Prodrive at home – PM me your email address and I’ll send it to you when I get home. If you do a search, there are a few in the member’s gallery and the car part reviews section.

YGPM
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Old 01-23-2006, 11:44 PM   #14
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Quote:
Originally Posted by Flaps
What diameter is the piping on the SPT axle back, and how much use has it had?

I just put on a full exhaust on my RS, but the Stromung catback I bought is stupidly loud and after ~200km I can't take it any more
I have a Stromung catback that was loud and droned, so I put the stock intermediate pipe with the resonator back in. It made a noticeable reduction in loudness. I don't know if this will work on your RS system, but might be worth a try.
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Old 01-24-2006, 12:09 AM   #15
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I've put the stock cat back on for now, so it's back to stock noise levels. We'll see how much perfromance I lose when I drive it tomorrow.

I love the power difference the system makes (TWE headers, Stromung cat and catback), but the noise kills it for me. The cat rattles like hell too

I might try a resonator, but I have a feeling it'll still be too loud with the Stromung axle back. I'd like to try something quieter first, then make sure I don't want to sell the catback before I hack it up and weld in a resonator.
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Old 01-24-2006, 01:02 AM   #16
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can i trade u with a OVAL tip for the round tip?

or ANYONE WANY MY OVAL TIP?
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Old 01-24-2006, 02:12 AM   #17
Wylde Horses
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Quote:
Originally Posted by Flaps
What diameter is the piping on the SPT axle back, and how much use has it had?

I just put on a full exhaust on my RS, but the Stromung catback I bought is stupidly loud and after ~200km I can't take it any more
It's a 2.5 inch system with a 4.5 inch tip. I'm not entirely sure how much use it has had - it was on the car when I bought it used a year ago. It appears to be in good shape though.
Here are a few pics:








Would you be interested in a trade for the stromung? Other then cutting and rewelding the exhaust flange, it should all fit, right (exhaust hangers, length of piping, etc)?

Last edited by Wylde Horses; 01-24-2006 at 02:20 AM.
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Old 01-24-2006, 09:59 PM   #18
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bump...
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Old 01-24-2006, 11:16 PM   #19
Flaps
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Quote:
Originally Posted by Wylde Horses
Would you be interested in a trade for the stromung? Other then cutting and rewelding the exhaust flange, it should all fit, right (exhaust hangers, length of piping, etc)?
I'm trying out one last thing before I really decide to get rid of the Stromung system. I should be able to say one way or the other in the next few days. In any case I probably wouldn't just trade the Stromung (it's an XA single tip) because it cost quite a bit more than the $200 you're asking for the SPT axle back.
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Old 01-24-2006, 11:24 PM   #20
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Quote:
Originally Posted by Lantec
Do they really make a difference in performance?
not unless they are of increased diameter. The 'flow increase' by less restrictive sound deadening, in an OEM sized system that retains a muffler, is normally so small to the point of being _almost_ un-measurable unless you go to truly straight (i.e. little to no muffling at all).

Now, if you have an all 3" system, and you still have a 2.25 or 2.5 cat-back or axle back, and you go to a 3", there is a big difference, regardless of how sound deadened it is.

So IMHO stock-ish OEM sizing is really mostly for cosmetic (i.e. sound) purposes. I can't off the top of my head remember the sizes of those ones. But they sound cool.

Last edited by patr; 01-24-2006 at 11:42 PM.
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Old 01-25-2006, 12:28 AM   #21
Wylde Horses
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Quote:
Originally Posted by Flaps
I'm trying out one last thing before I really decide to get rid of the Stromung system. I should be able to say one way or the other in the next few days. In any case I probably wouldn't just trade the Stromung (it's an XA single tip) because it cost quite a bit more than the $200 you're asking for the SPT axle back.
Yeah, I wasn't expecting a freebie, but it would definitely be cheaper then what I would pay to get it new Unfortunately though, I'm looking for a dual tip. But no worries, I'm not in a huge rush to sell, just PM me if/when ready.
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Old 01-25-2006, 12:31 AM   #22
Wylde Horses
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Quote:
Originally Posted by patr
not unless they are of increased diameter. The 'flow increase' by less restrictive sound deadening, in an OEM sized system that retains a muffler, is normally so small to the point of being _almost_ un-measurable unless you go to truly straight (i.e. little to no muffling at all).

Now, if you have an all 3" system, and you still have a 2.25 or 2.5 cat-back or axle back, and you go to a 3", there is a big difference, regardless of how sound deadened it is.

So IMHO stock-ish OEM sizing is really mostly for cosmetic (i.e. sound) purposes. I can't off the top of my head remember the sizes of those ones. But they sound cool.
Just out of curiousity, at what power range would you say a full 3" system really starts to show gains over a 2.5"? It's been debated back and forth quite a bit and it would be nice to have the opinion of someone who has as much tuning/racing experience as you.
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Old 01-25-2006, 12:57 AM   #23
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This might be a stupid question, but does anyone know if the Prodrive axle back will fit an 06 WRX?
From Johny
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Old 01-25-2006, 12:16 PM   #24
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Quote:
Originally Posted by Wylde Horses
Just out of curiousity, at what power range would you say a full 3" system really starts to show gains over a 2.5"? It's been debated back and forth quite a bit and it would be nice to have the opinion of someone who has as much tuning/racing experience as you.
It shows right away on the WRX stock turbo from 5000 rpm and up

On the STi's you need to go catted unless you do a mini-port on the wastegate (dont believe all the people that say they dont get creep - they just dont know they get creep or they are running way less boost than they could be) - but that is just a 2 hour job including taking it out and putting it back in.

the order should be up -> dp -> cb (i.e. its fine to do up / db and leave the cb - but if you get like a vf30, and a TMIC and are still running the OEM 2.5 muffler, you are really leaving a lot on the table at that point...). A lot of people skip the cb as its more exciting / rewarding / cost effective to get the turbo and injectors, but doing anything more than that and you are wasting it. FWIW, I ran a vf30 with a 2.5 straight pipe forever on my WRX, it ran great like that, but it was really really loud. A 3" turbo back would have been equally as flowing but way quieter. But I have seen many a turbo'd WRX with the OEM cat back and its often way below potential.

With an EBP (exhaust back pressure gauge) you can really see what is going on, but most people dont want me to drill and tap their up-pipe just to tune it :-)
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Old 01-25-2006, 03:31 PM   #25
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Quote:
Originally Posted by Wylde Horses
Yeah, I wasn't expecting a freebie, but it would definitely be cheaper then what I would pay to get it new Unfortunately though, I'm looking for a dual tip. But no worries, I'm not in a huge rush to sell, just PM me if/when ready.
No problem I'll let you know if I will want the SPT. I really want to keep the Stromung because it's really nicely made, but the noise factor will decide it.
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