HKS 75MM Cat-Back

roundfinger

Supramania Contributor
Aug 23, 2006
258
0
0
Pensacola, Florida, United States
I had this on the 89 turbo supra i just sold, there is a noticeable power gain but nothing to write home about. I had a magnaflow setup from 935 on there before that and it spooled a little quicker, felt a little more powerful and sounded a little more aggressive than the HKS.

But i liked the hks setup because it had twin exhaust tips and was quiet. This build up i am going to try raptor racing's muffler.

As for rust, i didnt have it long enough for it to get rust, but it was coated.

It was a good setup but if you want MAX power there are other kits to choose I think, but i dont have experience with them.
 

mkthree92

Supramania Contributor
Jan 21, 2007
163
0
0
AL
I'm running this catback, and I've been very pleased with it. In the past, people have had some problems with rust but I believe that was before they coated the exhaust. I purchased mine last fall and have had zero problems.

Power gains were pretty noticeable. The only mods I have is an A'pex Power Intake and this catback. I noticed a pretty good increase in throttle response and power, and this exhaust was installed after I had been running the intake and stock catback. The stock exhaust is so restrictive, even just 2 simple things like this can be considerably noticeable. As far as how much power, I can't give you an exact figure.

Like I said I have zero complaints with the exhaust. It's a well made, mandrel bent exhaust. The exhaust is quiet with a low rumble to it with the stock looking dual tips- just as I wanted. I have a clip up on Youtube, but my recorder didn't pick up the sound as good as it should, so I don't feel like it's a totally accurate example of the sound.

I bought it before I really saw what the vendors were selling and before I noticed them selling any stock looking and sounding 3" catbacks. I'm not even sure if any on here were even selling any like that when I bought mine. If I had a stock exhaust still, I don't know if I would buy this exhaust, only for the fact that at the cheapest price you can find it, you can get a stock looking and sounding custom one from a vendor for several hundred less. I paid $520 shipped and that is by far the cheapest I've found it and that is still a lot more than ones by vendors.

Maybe a dyno proving the HKS one is superior would change my mind, but I don't know. I'm glad I have mine and HKS is good stuff, but I guess it depends on your budget, wants, goals, and whether or not you want a "name brand."
 

Nick M

Black Rifles Matter
Sep 9, 2005
8,897
40
48
U.S.
www.ebay.com
The HKS system when tested for 65mm back in 1987 picked up a max of 36 rwhp, with peak to peak of 31 rwhp, with no other changes.

Yes, it looks stock and is fairly quiet.
 

Zazzn

l33t M0derat0r (On some other forum) n00blet here
Apr 1, 2005
972
7
18
Toronto/SF Bay area
hks 75mm turbo sport is the BEST muffler hands down..> Quite stright though, high flowing and won't make the cops look twice at you just wish i would last longer
 

blk92suprat

J Zizzle
Jul 6, 2008
456
0
16
USA
My supra is always garaged so I havent seen any rust issues either.

Im trying to keep my supra a sleeper and this exhaust is the only one I know of that is closest to stock noise.

Anyone running a different exhaust similar to stock noise levels?
 

KeithH

New Member
Mar 31, 2005
1,716
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Portland, OR
I've had this exhaust since 98 or 99. No rust issues here - but I did get the thing ceramic coated before I installed it.

I noticed a bigger boost in power from replacing the DP - and getting rid of the first cat.

The note on this exhaust is awesome. Not loud but a nice tone.

It is straight through so the flow is GREAT!
 

mkthree92

Supramania Contributor
Jan 21, 2007
163
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AL
Damn, I didn't realize it picked up that much whp- and that was 65mm! Disregard my above post then, get this exhaust!

I got mine at www.directtuning.com . It was $520 shipped (had free shipping) which is BY FAR the cheapest I've ever seen it for sale. It was already in stock and came quickly too. I was very pleased with their service.

EDIT: I see they now charge $585 for it...eh.
 

blk92suprat

J Zizzle
Jul 6, 2008
456
0
16
USA
Nick M;1088346 said:
The HKS system when tested for 65mm back in 1987 picked up a max of 36 rwhp, with peak to peak of 31 rwhp, with no other changes.

Yes, it looks stock and is fairly quiet.

Without a doubt it adds power but 30+rwhp seems a little ridiculous.

Where did you get those numbers from?
 

Ma70.Ent

Supramania Contributor
Feb 26, 2006
1,871
1
0
NJ
Mk3 Turbos get a lot of power by changing the exhaust around. The stock exhaust is THAT restrictive. Small diameter piping, crush bent, and baffled mufflers are some flaws of the stock one.
 

blk92suprat

J Zizzle
Jul 6, 2008
456
0
16
USA
I believe the HKS Turbo 75MM Exhaust has a baffled muffler like the stock muffler.

Correct me If I'm wrong?
 

supraboi009

New Member
Jun 26, 2008
3
0
0
Hawaii
I have the super drager exhaust and she like to boogie:naughty:
130mm tip/95mm pipe. Very noticeable power gains, and quiet so the po-po wont think twice.
very expensive though
 

Bluechulappa

New Member
Jun 16, 2007
839
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hOUSTON
www.houstonareasupras.com
Didn't the stop making this exhaust recently? When I ordered mine almost a year ago, I could barely get it and several vendors I talked to said they were all out and not be getting anymore and the place I got mine from said they were being discontinued and I was getting the second to last one from that company?

sm_photo_missing.jpg


sm_photo_missing.jpg


sm_photo_missing.jpg
 

blk92suprat

J Zizzle
Jul 6, 2008
456
0
16
USA
KeithH;1090248 said:
You can see straight through this thing. No baffling.
From SupraSport Description.....
Brand: HKS.

Model: Sport Turbo.

Type: Cat-Back exhaust system.

Fitment: Direct-fit, bolt-on, 7MGTE MA70 Supra.

Material: Mild Steel- Coated Piping, Muffler, Tip.

Design: 75mm pipes, 75mm dual tips.

Baffle: Resonator and Baffled Muffler.

Muffler: Oval type, dual outlet.

Sound: Near stock level.
 

Nick M

Black Rifles Matter
Sep 9, 2005
8,897
40
48
U.S.
www.ebay.com
akito;1089317 said:
Sorry but anyone has pictures of this exhaust?

Yes.

http://www.supramania.com/forums/showthread.php?t=43004


blk92suprat;1089828 said:
Without a doubt it adds power but 30+rwhp seems a little ridiculous.

Where did you get those numbers from?

Turbo Magazine.

08fee110.jpg

blk92suprat;1089956 said:
I believe the HKS Turbo 75MM Exhaust has a baffled muffler like the stock muffler.

Correct me If I'm wrong?

HKSUSA.com said:
Specifically engineered for turbo applications that require greater flow capacity than naturally aspirated applications, Turbo Exhaust systems use a straight through design. The increased flow characteristics offer a gain in boost pressure, boost response, a broader powerband and increases overall peak horsepower. Performance increases vary by application, with average gains of 10-25 horsepower.

Yeah, you are wrong. No big deal. It is common to have bad translations from Japanese into English. The factory repair manual has issues also. That doesn't help trying to get the right info out there. It is a straigh through muffler. I put a coat hanger through the hole you see. The sport exhaust for naturally aspirated engines is baffled.


HKS muffler.JPG