BRZ Rear Diffuser

[Kimsey47]

When building a BRZ for fun on the Subaru site there is a rear diffuser available for $750. It doesn't look like much, but besides getting some extra downforce on a track day (if it even provides any) is this worth considering for a daily driver? My understanding is that it wouldn't provide any extra benefit since it only assist with downforce at speed...

[IntenseDVDA]

Originally Posted by Kimsey47

When building a BRZ for fun on the Subaru site there is a rear diffuser available for $750. It doesn't look like much, but besides getting some extra downforce on a track day (if it even provides any) is this worth considering for a daily driver? My understanding is that it wouldn't provide any extra benefit since it only assist with downforce at speed...

To each his own. I ordered one mostly because I liked the visual more than anything. "Lots" of WRB on order!

[Turbowned]

It should help clean up the airflow going out the rear of the car. Unfortunately the rest of the underbody looks pretty turbulent. I think the JDM cars get some sort of smooth underbody panels but because of the US-market exhaust they eliminated it... How stupid!

I'm pretty much getting one for looks; I won't lie. It makes the arse-end look a lot more "finished"

[Dave-ROR]

I'm not convinced it's useful in any way (not real diffusers in general, this specific piece), so no.

[Kimsey47]

Originally Posted by Turbowned

It should help clean up the airflow going out the rear of the car. Unfortunately the rest of the underbody looks pretty turbulent. I think the JDM cars get some sort of smooth underbody panels but because of the US-market exhaust they eliminated it... How stupid!

I'm pretty much getting one for looks; I won't lie. It makes the arse-end look a lot more "finished"

Understood... That one in the picture you posted looks more pleasing to the eye. I guess that begs another question if this thing is going to be painted to match or just plastic because if so it will look like they put an asstache to match the front.

[Lighting Red]

Originally Posted by Dave-ROR

I'm not convinced it's useful in any way (not real diffusers in general, this specific piece), so no.

This. X1000. I think this car looks fantastic in stock trim. I refuse to throw anything on the body unless there is a clear, demonstrable advantage in performance over the stock configuration. The car has an impressive 0.27 Cd from the factory (with rear deck lid aero trim piece). I am loathe to ruin that Cd over what could potentially be a $750 appliqué component that does jack-shit.

PS: it looks idiotic with the US spec. exhaust tips.

[geb2391]

http://www.youtube.com/watch?v=ju6dt...layer_embedded

[OrbitalEllipses]

That's a walk around with about 3 seconds of rear diffuser action. We need to see the underbody, not the ass.

[FoolCyclist]

I ordered one for my SWP, but mainly just for that little bit of finished look to it. I agree it looks bad with the standard US exhaust tips, but I am already on planning on getting the HKS Legamax Premium exhaust with the much larger tips. Hopefully it helps to just make a better looking rear end and sets it apart from some of the other SWP out there. Although, I am also getting dark tints and black wheels, so that should help too.

[MRZ415]

Originally Posted by FoolCyclist

I ordered one for my SWP, but mainly just for that little bit of finished look to it. I agree it looks bad with the standard US exhaust tips, but I am already on planning on getting the HKS Legamax Premium exhaust with the much larger tips. Hopefully it helps to just make a better looking rear end and sets it apart from some of the other SWP out there. Although, I am also getting dark tints and black wheels, so that should help too.

I think plasti dip spray would be the better option
On the wheels.

[MmmHamSandwich]

It's likely this accessory won't provide any real value to a street car from a performance standpoint.

Furthermore I personally don't think it lends itself to making the car look better. Maybe it looks better in person, but based on the video and the pictures I frankly think it looks exactly like what it is, a piece of hastily tacked on trim.

If you like it more power to you. As for me, no thanks.

[Dave-ROR]

Originally Posted by MmmHamSandwich

It's likely this accessory won't provide any real value to a street car from a performance standpoint.

Furthermore I personally don't think it lends itself to making the car look better. Frankly I think it looks exactly like what it is, a piece of trim hastily tacked on.

If you like it more power to you. As for me, no thanks.

It won't for a track car either. This part I mean. It doesn't look effective from what we can see and if it were an effective piece there'd be more pics to show it. It's a body kit item, nothing more.

[Kimsey47]

Originally Posted by Dave-ROR

It won't for a track car either. This part I mean. It doesn't look effective from what we can see and if it were an effective piece there'd be more pics to show it. It's a body kit item, nothing more.

When I posed this question I was hoping you'd answer this Dave! Cheers!

[alluringreality]

Originally Posted by geb2391

http://www.youtube.com/watch?v=ju6dt...layer_embedded

Who makes the gas cap?

[RRnold]

It's an OEM accessory and an $$ part.

By itself, I wouldn't be surprised if it was all cosmetic. It may only become functional once you complete the rest of the aerodynamics; front, skirts and undercarriage diffusers.

Why not wait for an aftermarket unit that will have the same build quality but a lower price.

[eikond]

You guys are nuts to pay $750 for that thing from the factory.

Give it a couple months and you'll see 10 different aftermarket companies selling them on ebay for $200 shipped or less.


I agree that it looks pretty sharp, and I think i'd like to have one on my car at some point.. but not for $750.. holy crap!

[bryan]

Originally Posted by alluringreality

Who makes the gas cap?

Subaru makes that. But I believe it's just an applique, not an actual cap replacement.

[daiheadjai]

Originally Posted by geb2391

http://www.youtube.com/watch?v=ju6dt...layer_embedded

Judging from your post title, I'm afraid to click that link....

"Rear Underskirt video"

Just doesn't sound quite kosher...

[blacknbean]

would look sick with the USA TRD exhaust tips

[serialk11r]

As was said in previous threads, cover up the rear suspension components before thinking about underbody aero pieces.

[brianbot5000]

I'm kind of a fan of how it looks...I don't think any aerodynamic benefit would be noticeable for a daily driver.

I didn't get it but figure I can later - looks to be a simple bolt on.

[zoomzoomers]

Originally Posted by Dave-ROR

I'm not convinced it's useful in any way (not real diffusers in general, this specific piece), so no.

Originally Posted by RRnold

It's an OEM accessory and an $$ part.

By itself, I wouldn't be surprised if it was all cosmetic. It may only become functional once you complete the rest of the aerodynamics; front, skirts and undercarriage diffusers.

Why not wait for an aftermarket unit that will have the same build quality but a lower price.

^

There was another metal type defuser (ok air channeler ) for the BRZ/FRS that's available too. I'd rather pay for that one than this one. I highly doubt any of these aero stuff are actually effective, but hey to each his/her own.