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Old 06-27-2001, 03:47 PM   #1
HomerJay
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Question Sti exhaust vs Prodrive Exhaust

Does anyone have some comparative numbers for these two exhaust systems. I'm referring to the Prodrive exhaust at Mastro and the Sti exhaust at SPD. Also, does anyone know about fit of the prodrive. I don't want the exhaust to hang low and would like it to fit close to stock as possible.
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Old 06-27-2001, 04:05 PM   #2
Robmat
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It's kind of a moot issue unless you want to pay $675 new for the STi unit. I've been trying to get ahold of the STi part but Mike Shields is out of them (used) and only TRI Tuning has them new.
If you do happen to find one, please let me know. I believe the STi was dyno'd at an 8-10 HP increase

Robmat
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Old 06-27-2001, 05:19 PM   #3
HomerJay
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I know the STI exhaust is not full stainless. Is the prodrive one all stainless?
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Old 06-27-2001, 05:28 PM   #4
Robmat
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Oh yeah, that too. The STi is Stainless and Aluminized steel, Just like our stock muffler but with a larger interior and pipe diameter. I am not sure about the Prodrive.

Robmat
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Old 06-27-2001, 05:37 PM   #5
HomerJay
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Hey Robmat,

Are you sure Mike at SPD is out of the take off systems. I think he had 5 or so left when I last e-mailed him about 2 weeks ago.
I posted the questions about the Prodrive exhaust to the guys at Mastro and will post what they say when I get a response.

-JOE
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Old 06-27-2001, 05:42 PM   #6
Robmat
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Ha, Ha, that's funny-I just sent Mastro an e-mail as well. I spoke to Mike last night on the phone and he has none left I waited too long. He recommended the Stromung, but because of rust and just plain wanting the STi; I'm going to pass on it. It is really salty here in FL, especially near the beach! Like I said, please let me know if you do happen to find one! Good Luck-

Robmat
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Old 06-27-2001, 07:00 PM   #7
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ISR might be able to get you a prodrive exhaust.. I know that mastor is currently having difficulties with with prodrive and they are working hard to come up with some new financial agreement but for the mean time unless they have any instock you might not see them for atleast another month. which reminds me time to cancel my order for the P1 suspension.

Brad
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Old 06-28-2001, 09:25 AM   #8
omahasubaru
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Arrow Hmmmm.

IIRC, the Prodrive exhaust is designed for JDM/UK spec Turbo cars and since it isn't "standard" like the STi unit, wouldn't it likely be 2.5" or larger in diameter for a turbo? If this is true then STi is the best bet as going over 2.25" with out major engine mods (cams, heads) is rather pointless as I don't recall Prodrive making a specific exhaust for the EJ25 engine, only EJ20 turbo's.

Now Scooby Sport does have an EJ25 specific exhaust. It is nice as I've seen it, but I'm sure it is rather loud when compared to even a stromung.

I'll admit I'm partial to the STi because I have it, but it is the cheapest, less likely to rust, great sounding, and great performing exhaust on the market. It's worth every penny and few have it. It also doesn't give you the typical Import look of the coffee can exhaust tip and obnoxious sound at mild acceleration.

Just my $0.02

Thanks,

Jon

Last edited by omahasubaru; 06-28-2001 at 09:30 AM.
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Old 06-29-2001, 03:17 AM   #9
mr2hutch
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Just to let you know there is no difference between the scoobysport exhausts internals, the only difference is on the mounting.
Aside from materal, the differences in units is the amount of back pressure. Higher back pressure will give you more low end torque. lower back pressure will lower low RPM torque and give high end HP, there are limits to the amount of back pressure that is effective good or bad. And of course there will be some exhausts that will change these basic guide lines.

Ian
01 RS(soon to be JDM STi)
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