How To Install & Tips For ZL1 Splash Guards (Front & Rear)

Supbrah

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I’ve been having a hard time getting information from these guys on my order, very quick to charge me but not so quick to provide info. I cancelled my order. Their customer service leaves a lot to be desired.




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stacyoz

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installed my ZL1 rock guards with the hardware provided by the manufacturer. After a month or so, several of the screws holding the rear guard popped out and I lost the stand-offs. I believe the screws provided are specified as follows;
o SCREW, SHEET METAL, #8-16 X 1-1/2in, PAN HEAD, PHILLIPS, BLACK OXIDE

I was able to find similar stand-offs from the hardware store 1/2in O.D. x 3/4in. The original stand-offs were 1/2in O.D. x 0.8750in, so the gap between the guard and the fender is smaller, but not touching. I replaced the screws with a slightly bigger screw to solve this issue:
o SCREW, SHEET METAL, #10-16 X 1-1/2in, PAN HEAD, PHILLIPS, BLACK OXIDE
https://www.amazon.com/Stainless-Finish-Phillips-Thread-Length/dp/B00GI82EYS/ref=sr_1_2?dchild=1&keywords=Screws&pd_rd_r=99a2a98c-a9b2-47db-a8e0-bdc4a3c35dcd&pd_rd_w=7WHqO&pd_rd_wg=muJvu&pf_rd_p=91473338-a775-4a82-9600-6767cae1f29a&pf_rd_r=Y9WES3MMRJD6ZS07J6PK&pid=VyRJshz&qid=1598501736&refinements=p_n_feature_twenty-eight_browse-bin:19043685011,p_n_feature_fourteen_browse-bin:17910826011,p_n_feature_two_browse-bin:2292861011|2292869011|3119702011,p_n_feature_thirteen_browse-bin:15245615011|15245616011&s=industrial&sr=1-2

Hope this helps anyone that runs into this issue.

UPDATE: I contact ZL1 with this issue and suggestion and they sent me a mounting hardware kit for the rear rock guards to resolve the issue. They noted my suggestion on the screw size change.
 
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Kiwi Greg

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I have just come back from a 600 mile round trip for my daughters 21st party

My partner & I had the Supra loaded up a bit not to bad though

I'm on H&R springs with a decent rear alignment with around 2 degrees negative camber with 285-30 x 20 on 10.5" rims

They have pretty decent offset & the rim just sits inside the guard, just

If you have every been on our roads here they are like your canyon roads except a little narrower & rougher from what I've on in car footage

I had a rub on the drivers rear wheel in dips when the suspension loaded up over bridges & hollows etc

Couldn't see it when I was down there so pulled a wheel when I got home

IMG_5779.jpg


Turns out it was rubbing on the top screw somehow, so I removed the SS washer I put on to give it a little more clearance

IMG_5780.jpg


It wasn't a bad rub just annoying o_O
 

H2O_Doc

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I assume these fit a ‘21 as well. Anyone know otherwise?
 

stacyoz

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Minor issue: Per ZL1 installation instruction, I believe the front rock guards should be installed BETWEEN the car sheet metal and the wheel well shell. This was discussed earlier in this thread or other threads.
 

supradupra

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installed my ZL1 rock guards with the hardware provided by the manufacturer. After a month or so, several of the screws holding the rear guard popped out and I lost the stand-offs. I believe the screws provided are specified as follows;
o SCREW, SHEET METAL, #8-16 X 1-1/2in, PAN HEAD, PHILLIPS, BLACK OXIDE

I was able to find similar stand-offs from the hardware store 1/2in O.D. x 3/4in. The original stand-offs were 1/2in O.D. x 0.8750in, so the gap between the guard and the fender is smaller, but not touching. I replaced the screws with a slightly bigger screw to solve this issue:
o SCREW, SHEET METAL, #10-16 X 1-1/2in, PAN HEAD, PHILLIPS, BLACK OXIDE
https://www.amazon.com/Stainless-Finish-Phillips-Thread-Length/dp/B00GI82EYS/ref=sr_1_2?dchild=1&keywords=Screws&pd_rd_r=99a2a98c-a9b2-47db-a8e0-bdc4a3c35dcd&pd_rd_w=7WHqO&pd_rd_wg=muJvu&pf_rd_p=91473338-a775-4a82-9600-6767cae1f29a&pf_rd_r=Y9WES3MMRJD6ZS07J6PK&pid=VyRJshz&qid=1598501736&refinements=p_n_feature_twenty-eight_browse-bin:19043685011,p_n_feature_fourteen_browse-bin:17910826011,p_n_feature_two_browse-bin:2292861011|2292869011|3119702011,p_n_feature_thirteen_browse-bin:15245615011|15245616011&s=industrial&sr=1-2

Hope this helps anyone that runs into this issue.

UPDATE: I contact ZL1 with this issue and suggestion and they sent me a mounting hardware kit for the rear rock guards to resolve the issue. They noted my suggestion on the screw size change.
are these screws the same thread as the OEM ones?
 

Supra Werty

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Did mine yesterday. No real issue other than those plastic rivets are very difficult to get in right
 

cactusA91

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As reported rear wheel guards ship with No 8 or M4 screws - they never really grip...see pic below. Fat ones came out, skinny ones are what ZL1 supplies.

Picked up No 10 1.5" in black from Ace Car Supply (my guess is they use M5 proprietary trim screws but I couldn't find any). No 12 too big. No. 10 perfect size. 43 cents each. YMMV.

IMG_0354.jpeg
 

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