08-23-2020, 04:59 PM | #1 |
Diffuser doesn't line up
I just installed an OEM 1LE diffuser after removing the factory GFX, but both of the sides look like this. I'm assuming that's not normal?
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08-23-2020, 07:45 PM | #2 |
Drives: 2010 Camaro 2SSRS M6 Join Date: Jan 2019
Location: Alabama
Posts: 1,249
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Never installed this type but I have seen many others post about this same problem with diffusers
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08-23-2020, 08:27 PM | #3 |
08-23-2020, 10:21 PM | #4 | |
Drives: 2010 CGM 2SS/RS LS3 Swapped A6 Join Date: Sep 2016
Location: Spring Hill, FL
Posts: 4,569
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He is trying to install an OEM 1LE diffuser, which you would assume would fit perfectly. The top isn't really that bad but the side is much worse. I'm sure the bumper installed on GFX cars is identical to the others, so this really is weird. Only other thing I could think of is if the new diffuser was a little warped or bent from shipping, causing it to come up short on the sides. Ben, not trying to insult, but you are 100% sure that is a GM branded diffuser?
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08-23-2020, 11:38 PM | #5 | |
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08-24-2020, 07:30 AM | #6 |
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The only difference in 2010-13 rear fascias is later 2010 and on versions had the holes for backup sensors. If the GM part number is molded onto the back of this 1LE diffuser, Sumitt got a knock off part or the supplier for GM changed their molding dies, highly unlikely. You had the rear fascia off the car to remove the GFX diffuser and install this one correct?
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08-24-2020, 07:53 AM | #7 | |
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Edit: Summit just sent out a replacement, so hopefully it fits correctly. Last edited by BenLC; 08-24-2020 at 10:26 AM. |
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08-24-2020, 11:58 AM | #8 |
Drives: 2010 CGM 2SS/RS LS3 Swapped A6 Join Date: Sep 2016
Location: Spring Hill, FL
Posts: 4,569
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I believe GM parts have their logo branded or stamped into them. Not sure if its done on all parts, but I am fairly certain there should be some sort of identifier.
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2010 CGM Camaro 2SS LS3 Swapped A6 - GPI LS3 SS1 .647/.638, (224/237, 112 +4, 7º overlap) on CamMotion 8620 core, BTR Platinum .660" Dual Spring kit w/titanium retainers, CHE bronze trunnion upgrade, stock heads milled @ .015, Melling HV 10296 oil pump, TSP 1-7/8" long tube headers (W/Catless Off-road Pipes), Corsa Xtreme 3" Catback, GPI Ported/Rod Mod Intake, Stage 2 Ported Throttle Body, Vararam OTR CAI, Mike Norris Gen 2 catch can + GM 1LE clean side separator, 160º thermostat - Megan Racing adjustable coilovers (lowered 1.75"), MRR M017 10/11" wheels-Tuned by Ryan @ GPI
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08-24-2020, 05:25 PM | #9 |
Drives: 2011 SS-RS Join Date: May 2011
Location: FLORIDA
Posts: 11,294
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The ones Summit sells might be a knock-off made by another company and they are listing it as the GM part number. I have seen this with other parts folks bought that said they were GM, but weren't. When I bought my 1LE diffuser I got it from my Chevy dealership and it has the GM part number molded on the inside of it, even the stock SS one I took off had a part number on it. I have noticed with ALL GM replacement parts I purchased, including the tail light bezels, the GM part number is on them. I got a set of gloss black ones from Phastek and they didn't have any part number on them. Good luck sir.
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08-24-2020, 06:26 PM | #10 | |
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08-24-2020, 06:38 PM | #11 |
Evil Genius of Chevrolet
Drives: 2017 Z06, 2019 XTS, 2013 SS Join Date: Feb 2017
Location: New York
Posts: 3,259
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Was the rear bumper cover ever changed? Are you the original owner?
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08-24-2020, 07:16 PM | #12 |
No, I'm the second owner. To my knowledge the bumper has never been replaced, but it's possible. Though I don't think that's the problem. There are no other fitment issues anywhere else on the car, and the factory GFX diffuser I removed fit perfectly.
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08-25-2020, 06:19 AM | #13 |
AKA "Beefcake"
Drives: 2023 ZL1 Sharkskin Join Date: Oct 2009
Location: Indy
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is the fitment issue with the rear quarter panel? Or is that same gap on both sides? I agree, something just doesn't seem to be right on that alignment and it has so be something with all the parts it is connecting to.
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08-25-2020, 09:13 AM | #14 |
Drives: 2011 SS-RS Join Date: May 2011
Location: FLORIDA
Posts: 11,294
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^^^ agreed, there must be something else going on as that diffuser should just fit right in there without any gaps all the way around. Wonder if it might be a spacing issued due to the GFX rear bumper maybe being a bit wider at the diffuser area? Matbe a wider opening?
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