BRZ Rear Diffuser - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Kimsey47 · 04-12-2012, 02:20 PM

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 · 04-12-2012, 02:23 PM

Quote:

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 · 04-12-2012, 02:27 PM

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 · 04-12-2012, 02:28 PM

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

Kimsey47 · 04-12-2012, 02:33 PM

Quote:

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 · 04-12-2012, 02:45 PM

Quote:

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 · 04-12-2012, 02:45 PM

OrbitalEllipses · 04-12-2012, 02:48 PM

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

FoolCyclist · 04-12-2012, 02:51 PM

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 · 04-12-2012, 03:26 PM

Quote:

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 · 04-12-2012, 04:18 PM

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 · 04-12-2012, 04:19 PM

Quote:

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 · 04-12-2012, 04:22 PM

Quote:

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! :happy0180:

alluringreality · 04-12-2012, 06:26 PM

Quote:

Originally Posted by geb2391

Who makes the gas cap?

04-12-2012, 02:20 PM	#1
Kimsey47 Senior Member Join Date: Mar 2012 Drives: 2016 STI DGM Location: Chattanooga, TN Posts: 1,875 Thanks: 1,189 Thanked 1,460 Times in 662 Posts Mentioned: 9 Post(s) Tagged: 0 Thread(s)	BRZ Rear Diffuser 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...

04-12-2012, 02:28 PM	#4
Dave-ROR Site Moderator Join Date: Dec 2010 Drives: Stuff Location: Florida Posts: 10,317 Thanks: 955 Thanked 5,965 Times in 2,689 Posts Mentioned: 262 Post(s) Tagged: 8 Thread(s)	I'm not convinced it's useful in any way (not real diffusers in general, this specific piece), so no. __________________ -Dave Track cars: 2013 Scion FRS, 1998 Acura Integra Type-R, 1993 Honda Civic Hatchback DD: 2005 Acura TSX Tow: 2022 F-450 Toys: 2001 Chevrolet Corvette Z06, 1993 Toyota MR2 Turbo, 1994 Toyota MR2 Turbo, 1991 Mitsubishi Galant VR-4 Parts: 2015 Subaru BRZ Limited, 2005 Acura TSX Projects: 2013 Subaru BRZ Limited track car build FS: 2004 GMC Sierra 2500 LT CCSB 8.1/Allison with 99k miles

04-12-2012, 02:45 PM	#7
geb2391 Senior Member Join Date: Mar 2012 Drives: Subaru CBS BRZ Limited Auto Location: Pocatello, Idaho Posts: 137 Thanks: 0 Thanked 42 Times in 26 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	Rear Underskirt video

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04-12-2012, 02:48 PM	#8
OrbitalEllipses Banned Join Date: Jan 2012 Drives: Attitude Location: MD Posts: 10,046 Thanks: 884 Thanked 4,889 Times in 2,902 Posts Mentioned: 123 Post(s) Tagged: 4 Thread(s)	That's a walk around with about 3 seconds of rear diffuser action. We need to see the underbody, not the ass.

04-12-2012, 02:51 PM	#9
FoolCyclist Member Join Date: Mar 2012 Drives: SWP BRZ Limited, MT Location: Jacksonville, FL Posts: 92 Thanks: 213 Thanked 44 Times in 19 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	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.

04-12-2012, 04:18 PM	#11
MmmHamSandwich You know you want it. Join Date: Mar 2012 Drives: '13 FR-S Location: RVA Posts: 705 Thanks: 160 Thanked 327 Times in 154 Posts Mentioned: 9 Post(s) Tagged: 2 Thread(s)	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.

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