Yonaka Scion FR-S Exhaust Prototyping
 

Here are a few shots of the Yonaka Motorsports exhaust prototyping.

System should be ready for market this fall. There will actually be two systems available, what is shown here is the axle back system which is similar in layout to the OEM system (only lighter, better flowing and much prettier). The axleback system will bolt to the factory midpipe location.

There will also be a dual muffler system that will be a full catback, eliminating many of the more restrictive sections of the factory exhaust.

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and the catback... starting with the mid pipe.

More photos next week.

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I guess I"ll start with the basic questions most will want to know;

1. Dyno results of both systems
2. Estimated Price
3. Sound clip.

Thank you

1) It will be some time before final production pieces are ready. The muffler shown is a mule, final dimensions will likely change. Of course, dynos will be made public once we have final specs and production ready pieces on hand.

The axleback won't make enormous amounts of power, truth be told there isn't enormous restriction in the OEM system at the final axle-back section. The catback system will undoubtedly show much larger gains, since the OEM midpipe is crimped more than once and has multiple hard bends that will be removed in the full system.

Having said that, usually we leave most of the dyno "proof" in the hands of our real world customers. That prevents the type of BS claims we saw running rampant in that other companies thread...

2) Axleback will be ~$450 and the dual muffler full catback system will be ~$650. Those are estimated MSRPs, dealers may sell for less.

3) I'll post some clips next week, the projects car doesn't even have breakin miles completed yet so we need to run the muffler for a bit and be able to take it to redline before we can record video/sound clips.

I didn't know Phil Donahue was into motorsports. Sweet!

LOL, that's Ed Crilly from Wicked Garage. He's been the lead on the fabrication of the Yonaka FR-S exhaust project. We're very lucky to be able to work with him and his crew. He's a local legend in the racing & hot rod scene in Eastern Ontario.

The guys at WG have been awesome to work with, they do bad ass work on bad ass cars. If you're bored, check out some the wild projects they've done...

www.wickedgarage.com

If you dig into the albums on their facebook page, you can find many more photos of the FR-S exhaust buildup.

http://www.facebook.com/WickedGarage

650?? Oh baby, bookmarked.

More pictures of the full catback system prototyping.

Please note these were taken with an iphone "in progress" while we were building the system. So yes, I know the tips aren't lined up in one photo and the system seems to be hanging too low in another (because it's not hooked up to the midpipe). But it gives you an overall feel for the system...

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Looks good. Love the two canisters branching out in the back, similar to the SRT system, but much cheaper than their catback!

if dynos show a good amount of gain, you have my money!!!

lol

Yeah, you invented the "Y" dual canister exhaust. GTFO of here with that garbage.

That "design" has been in the import scene for at least 20 years, hell I remember the early 90s when HKS did the Super Dragger for the MR-2 in the same overall design. I'll give you the benefit of the doubt and assume you're just too young to remember that.

You stay in your thread, we'll stay in ours.

ouch :brokenheart:

yup!

HKS, phoenix's power, garage fukui all designed the Y dual canister back in the 90s


no matter how similar the design is, it all comes down to performance and price

right now yonaka is +1 on price

SRT, you guys sure have some balls. Been around long enough to invent that design, have you?

Sheeeeesh... :|

Well this thread isnt going to last too long


Sent from my iPhone using Tapatalk

Agency Power Catback - Y form

http://www.agency-power.com/catalog/...qnl09mi8ukf4n5

Lachute Catback - Y form

http://www.lachuteperformance.com/?p=1143

Autofactory - Y form

http://cdn.mkimg.carview.co.jp/minka...ad52cb3a18.jpg

Errybody's doin' it. Not patented, not stealing.

EDIT: Oh, you're talking abut dual canisters... My point still stands.

edited for civility.

Back to the actual content...

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Y-fabrication.

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A simple jig is made for initial fitment of the mufflers to the Y.

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Damn i may have to buy the axle back just on how you handled that. I don't care for the split dual muffler look myself no matter who made it first.

Saw the pics immediately thought SRT exhaust, from the color of the car to the tips. Scrolled down to see a forum war going on lol

Looking at the pictures, do you guys think you'll have any chatter or vibration from the canisters being so close that they are nearly touching?

Thanks!

Good question.

On this prototype, everything from the rear differential back is fully welded as one piece. Both mufflers and tips. So there wouldn't be any chatter between them, you can try to squeeze them together like one of those chest exercise machines and they don't budge. You can't get them to touch even if you wanted to. We considered joining the two mufflers together and making a nice weld between them as a visual thing at the back, but decided against it for now. Of course, if we notice any issues during road testing we will evaluate and make changes.

Again, this is still early pre-production work. We will tweek and adjust the mufflers and resonators in the system for both fitment and sound properties. It is very likely the final production model will have slightly more or less spacing between the two mufflers. It is a fairly long process to get new products to market, and most of that is early testing in order to weed out that type of potential issue before a products gets into the customers hands.

Can we maybe reduce the size of the mufflers? Those things are huge!

Perfect! :thanks:

I do like the way it looks. I AM a fan of the dual canister look and those fat-boys being so close yet obviously not touching just looks attractive to me.

I'm pretty sold on the SRT exhaust after seeing all the work that went into them and the ingenuity going on with other products but depending on how this sounds it could be a close second.

My 1st comment was made only because at the initial time of your post you were NOT a vendor, if you were a vendor at the time you made your initial post there would have been no comments made at all.

Glad to see that you are now a supporting vendor of the site. Welcome.

IMHO, as long as they do a good job of canceling drone and controlling loudness, I don't mind since the only person seeing them will be you when installing it

:happy0180:

Harsher content has been retracted.

Believe me, this has been an ongoing debate with us internally as well.

The two "huge" mufflers in the shot are actually only 15.5" long each in body. The have centered inlet/outlets. That's the largest we can fit and still have a direct "Y" path to the tips.

For full production, we have the option to decrease that down to a 10"-14" canister, or change to an offset inlet and/or outlet. Generally speaking, the bigger the canisters and more centered the inlet/outlet, the quieter things will be. So the system as shown should be about as quiet a direct dual system as can be made with straight through mufflers.

Could this be done on an order-by-order basis, or would you be picking one setup and running with it?

Just curious ;)

Looks good, price is good, now for the sound...

And I know everyone is talking about a quiet exhaust, but I'm not looking for the quietest exhaust ever.

Well I don't mind the length of the mufflers but the width of the oval is what i'm talking about.

Unfortunately, we aren't really equipped to produce "one-offs". At some point, a final decision will be made on the muffler canister size

Having said that, we don't tell people what they like, they tell us. Based on feedback from our customers and dealers, we do make adjustments and revisions as time goes on. The market demand will dictate the systems we send to full production.

(there is also talk of producing a single exit muffler design, but that might be a ways down the pipeline)

Clearance and sound testing will be the deciding factors for the muffler sizes. So I can't really say if the mufflers will be longer/shorter/wider at this point.

As another member pointed out, other than when you are unwrapping it from the original packaging, you don't really see much of the mufflers on this car once it's installed.

What diameter pipe are you going to be running with the production version.

The piping is 2.5" (63mm).

possible to mate your original axel back to your catback midpipe? i like the stock/TRD/ Perrin style setup for muffler and all.. lil less modded lookin IMHO. not that there's anything wrong with a blatant exhaust change... hell i slow down and open windows just to hear whenever i see an obvious exhaust... i'm just keeping mine as stealth as possible (after all my license plate is stealth :P)

Love the look of this exhaust, and im very happy to see someone finally making an exhaust at a practical price!!

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