Velox rear diffuser

secondnissan · 09-22-2017, 01:34 AM

2017-09-22 01.52.11.jpg

2017-09-22 01.53.04.jpgHere are some photos of the front bracket being narrowed. I used tin snips to cut the diffuser on the inside of the outside slots . I then drilled two sets of holes to replace the slots that were cut out. Holes are 3/4 of an inch from sides of tab. Holes are 1/4 diameter. For the bracket I used a dremel cutting wheel and cut to match diffuser width and holes. Filed down sharp edges and painted exposed metal with flat black spray paint. Hope to fit it tomorow. Debating whether I want to cut holes for the bottom of mufflers to protrude so I can tuck the diffuser up higher.

secondnissan · 09-22-2017, 01:43 AM

2017-09-22 01.49.53.jpg

2017-09-22 01.51.04.jpg

Hotrodz · 09-22-2017, 08:44 AM

Quote:

Originally Posted by NorthStyle

Do yours hang that much lower than the normal TDX due to being 3"? Just wondering since secondnissan's clears minus the bracket and you say that yours won't fit at all.

I had not thought about that and I think you nailed it. Even with an extension as posted will not work for my exhaust as I had the same idea. The mufflers are to low and there is not enough space to get to the mounting point. I'm just gonna bite the bullet and get a custom one built.

Steeles350 · 09-23-2017, 06:25 PM

Quote:

Originally Posted by Hotrodz

I had not thought about that and I think you nailed it. Even with an extension as posted will not work for my exhaust as I had the same idea. The mufflers are to low and there is not enough space to get to the mounting point. I'm just gonna bite the bullet and get a custom one built.

well at least you have a good template for a custom piece?

i've still got a stubborn bolt to break loose so I can stat installing mine. though now that I know I'm gonna have to mod the brackets it's gnna be maybe next week when i can run to my buddies shop and harassing him into helping

secondnissan · 09-23-2017, 10:06 PM

After trying to install today it doesn't clear the fast intentions exhaust mufflers afterall. Even on the diffusers lowest setting it touches the front bottom of the mufflers. Plan is to cut a 3x3 slot for both mufflers to clear. Hopefully this will allow me tuck the diffuser up higher, might as well if I have to cut it. Wish me luck. Pics to follow.

secondnissan · 09-24-2017, 09:28 PM

Well after cutting 3x3 holes for the mufflers the diffuser fits. The bolts that go under the mudflaps didn't exactly line up as sent from velox. I had to keep the diffuser side brackets loose and then tighten them after the mudflap bolts were lined up. I also had to battle two stripped bolts ( one mudflap bolt ,one rear brace bolt)

secondnissan · 09-24-2017, 09:31 PM

One more pic

Spooler · 09-24-2017, 10:53 PM

That looks good. With Carbon Fiber mufflers these cans would not even be noticeable. Me likey.

Hotrodz · 09-25-2017, 08:40 AM

Great Job!

Steeles350 · 09-25-2017, 05:03 PM

glad to see it can be made to fit without too much effort. i wonder how the cutouts will effect the airflow around the diffuser?

secondnissan · 09-25-2017, 05:13 PM

My guess is it won't affect it much at all. Mufflers basically fill the void and sit flush with the bottom of the diffuser.

NorthStyle · 10-21-2017, 02:41 PM

So, today I went and installed the diffuser on my Nismo, again with Fast Intentions exhaust... this was seriously a bigger pain in my *** than I expected and for anyone with a Nismo and the TDX, I'd honestly tell you to pass on this if you haven't already purchased it unless you don't mind a bit of cutting.

1) The instructions that Velox/Verus provide are next to useless.
2) The 09-14 Nismo rear bumper does not have the same holes in it that the Base/Sport bumpers do that the diffuser uses for mounting. 2 of the 4 that are required are there, and it holds tight, but I'd prefer if all 4 were in use.
3) The Nismo bumper will have to be cut/notched for the side brackets. No getting around this. Bright side, no one will notice unless they're on their side inspecting the bottom of your vehicle.
4) As secondnissan mentioned above, you'll have to cut the diffuser to allow space for the FI mufflers to poke through. I have the carbon canisters so it's not noticeable, but I'd have preferred to not butcher it to make it fit.
5) Because of the FI exhaust, you are only able to mount the diffuser on the lowest setting. The good part is that it's still higher than the FI mufflers sit... the bad part is it makes it appear to be a huge gaping hole between the bottom of the bumper and the diffuser itself unlike how the Base/Sport bumpers are.
6) The fitment was... less than desirable; even after modifying the diffuser to fit, I had to damn near take everything apart to create enough leverage to tighten everything up properly.
7) (Back to the Nismo bumper), the rear center bracket WILL NOT FIT. Period. Let me rephrase that: The rear bracket fits, but there is too much space between the bumper and diffuser (see #5) for them to mate to one another and be screwed. I had to go to the hardware store and buy a few different sizes of screws (M8x100/120/140mm) to what would allow the rear middle to be braced.

Now, if you have a Nismo and an exhaust that has been proven to fit you'll probably have a much better time installing it than I did. Also, I don't want to make it seem like it was hard; it wasn't by any means. Just tedious and time consuming with a lot of test fit, cut, test fit again, cut again, rinse/repeat.

I'll admit that it looks good and I'll be able to test it tomorrow on the autobahn and Nurburgring since they'll have the VLN configuration

Hotrodz · 10-21-2017, 04:26 PM

Nice can't wait to hear your review of it at speed.

echoshotz · 10-31-2017, 11:04 PM

Quote:

Originally Posted by NorthStyle

So, today I went and installed the diffuser on my Nismo, again with Fast Intentions exhaust... this was seriously a bigger pain in my *** than I expected and for anyone with a Nismo and the TDX, I'd honestly tell you to pass on this if you haven't already purchased it unless you don't mind a bit of cutting.

........

I'll admit that it looks good and I'll be able to test it tomorrow on the autobahn and Nurburgring since they'll have the VLN configuration

Do you have any more photos of the diffuser? And does the Nismo bumper limit how high up the diffuser can tuck up?

ClovisLotus · 06-06-2018, 08:26 PM

I installed this diffuser on my 2014 a while ago. The install was a serious pain for me but in the end I was pleased how it turned out. Its very unique but also subtle.

09-22-2017, 01:34 AM	#136 (permalink)
secondnissan Base Member Join Date: May 2011 Location: chicago burbs Posts: 70 Drives: 10 370z 7at Rep Power: 13	2017-09-22 01.52.11.jpg 2017-09-22 01.53.04.jpgHere are some photos of the front bracket being narrowed. I used tin snips to cut the diffuser on the inside of the outside slots . I then drilled two sets of holes to replace the slots that were cut out. Holes are 3/4 of an inch from sides of tab. Holes are 1/4 diameter. For the bracket I used a dremel cutting wheel and cut to match diffuser width and holes. Filed down sharp edges and painted exposed metal with flat black spray paint. Hope to fit it tomorow. Debating whether I want to cut holes for the bottom of mufflers to protrude so I can tuck the diffuser up higher. Last edited by secondnissan; 09-22-2017 at 02:01 AM.

09-22-2017, 01:43 AM	#137 (permalink)
secondnissan Base Member Join Date: May 2011 Location: chicago burbs Posts: 70 Drives: 10 370z 7at Rep Power: 13	2017-09-22 01.49.53.jpg 2017-09-22 01.51.04.jpg Last edited by secondnissan; 09-22-2017 at 01:57 AM.

09-23-2017, 10:06 PM	#140 (permalink)
secondnissan Base Member Join Date: May 2011 Location: chicago burbs Posts: 70 Drives: 10 370z 7at Rep Power: 13	After trying to install today it doesn't clear the fast intentions exhaust mufflers afterall. Even on the diffusers lowest setting it touches the front bottom of the mufflers. Plan is to cut a 3x3 slot for both mufflers to clear. Hopefully this will allow me tuck the diffuser up higher, might as well if I have to cut it. Wish me luck. Pics to follow. Rusty and Hotrodz like this.

09-25-2017, 08:40 AM	#144 (permalink)
Hotrodz Premium Member Join Date: Aug 2012 Location: NW, AZ Posts: 9,330 Drives: 10 Nissan 370z Nismo Rep Power: 2684384	Great Job! __________________ *Fast Intentions TT Installed and Tuned by Seb at SpecialtyZ 610whp 560tq:\|Fast Intentions 3" TT-TDX*\|SpecialtyZ/Fast Intentions 72 Row Oil Cooler\|SZ 6 Puck Clutch & Flywheel\|3GsCustoms\|Z1\|Wavetrac\|Hotchkis\|Whiteline \|Blitz\|Fortune Auto 500\|Fujimura\|SPL\|H&R\|TK\|TWM\|RPM Rollbar\|Sparco\|Next Level Performance\|TrackSpec\|AeroFlow Dynamics\|Pioneer\|

09-25-2017, 05:13 PM	#146 (permalink)
secondnissan Base Member Join Date: May 2011 Location: chicago burbs Posts: 70 Drives: 10 370z 7at Rep Power: 13	My guess is it won't affect it much at all. Mufflers basically fill the void and sit flush with the bottom of the diffuser. Hotrodz, Bill and Steeles350 like this.

09-24-2017, 10:53 PM	#143 (permalink)
Spooler A True Z Fanatic Join Date: Jun 2014 Location: Ga Posts: 13,507 Drives: 2013 Nismo 370z Rep Power: 2684391	That looks good. With Carbon Fiber mufflers these cans would not even be noticeable. Me likey.

09-25-2017, 05:03 PM	#145 (permalink)
Steeles350 Base Member Join Date: Jun 2017 Location: NC Posts: 55 Drives: 2009 370z touring Rep Power: 23	glad to see it can be made to fit without too much effort. i wonder how the cutouts will effect the airflow around the diffuser?

10-21-2017, 04:26 PM	#148 (permalink)
Hotrodz Premium Member Join Date: Aug 2012 Location: NW, AZ Posts: 9,330 Drives: 10 Nissan 370z Nismo Rep Power: 2684384	Nice can't wait to hear your review of it at speed. Rusty likes this. __________________ *Fast Intentions TT Installed and Tuned by Seb at SpecialtyZ 610whp 560tq:\|Fast Intentions 3" TT-TDX*\|SpecialtyZ/Fast Intentions 72 Row Oil Cooler\|SZ 6 Puck Clutch & Flywheel\|3GsCustoms\|Z1\|Wavetrac\|Hotchkis\|Whiteline \|Blitz\|Fortune Auto 500\|Fujimura\|SPL\|H&R\|TK\|TWM\|RPM Rollbar\|Sparco\|Next Level Performance\|TrackSpec\|AeroFlow Dynamics\|Pioneer\|

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