Dorman 13849 Truck Bed Mounting Hardware

Name: Dorman 13849 Truck Bed Mounting Hardware
Brand: Dorman
SKU: BCZF-13849
Price: 48.22 USD
Availability: InStock

⚙️ 255 vehicles fit this part

🔍

Select your vehicle to confirm fitment

Verify this part fits before purchasing — free returns if it doesn't

$48.22Free Shipping

🚚Free ShippingNo Cost to Continental U.S.

🔄Free Returns*Wrong fit? No cost

🛡️60-Day ReturnsMoney back guarantee

*Free return shipping only qualifies if our fitment verification tool is used.

🔥

✅ In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.

✅OE Direct Replacement — Bolt-on fit, no modifications needed

🚗Fitment: Cadillac, Chevrolet, and GMC, Avalanche, Avalanche 1500, Avalanche 2500, Cheyenne, Escalade, Escalade ESV, Escalade EXT, Sierra, Sierra 1500, Sierra 1500 Classic, Sierra 2500 HD, Sierra 2500 HD Classic, Sierra 3500 HD, Silverado 1500, Silverado 1500 Classic, Silverado 2500 HD, Silverado 2500 HD Classic, Silverado 3500 HD, Suburban 1500, Suburban 2500, Suburban 3500 HD, Tahoe, Yukon, Yukon XL, Yukon XL 1500, and Yukon XL 2500

🔄Easy Returns — Return within 60 days for a full refund

🚚Fast Shipping — Most orders ship same business day before 1pm CST

Not what you need? Click here for all Truck Bed Mounting Hardware options

Dorman 13849 Truck Bed Mounting Hardware

Brand	Dorman
Part Number	13849
Bolt Grade	10.9
Bolt Thread Type	Coarse
Bolt Thread Type	Grueso
Bolt Maximum Length	139.5
Bolt Maximum Length	147
Bolt Minimum Length	138.4
Bolt Minimum Length	145.8
Bolt Thread Diameter	12 mm
Bolt Thread Diameter	14 mm
Contenidos del paquete	2 pernos m12
Contenidos del paquete	2 tuercas m12
Contenidos del paquete	6 pernos m14
Diámetro de rosca del perno	12mm
Diámetro de rosca del perno	14mm
Material	Acero al carbono
Material	Carbon steel
Package Contents	2 m12 bolts
Package Contents	2 m12 nuts
Package Contents	6 m14 bolts

This part fits 255 vehicles. Search below:

Year	Make	Model	Position	Notes
2021	Cadillac	Escalade	N/A	M14 x 2.00 x 126mm
2021	Cadillac	Escalade ESV	N/A	M14 x 2.00 x 126mm
2021	Chevrolet	Cheyenne	N/A	M14 x 2.00 x 126mm
2021	Chevrolet	Silverado 1500	N/A	M14 x 2.00 x 126mm
2021	Chevrolet	Silverado 2500 HD	N/A	M14 x 2.00 x 126mm
2021	Chevrolet	Silverado 3500 HD	N/A	M14 x 2.00 x 126mm
2021	Chevrolet	Tahoe	N/A	M14 x 2.00 x 126mm
2021	GMC	Sierra	N/A	M14 x 2.00 x 126mm
2021	GMC	Sierra 1500	N/A	M14 x 2.00 x 126mm
2021	GMC	Sierra 2500 HD	N/A	M14 x 2.00 x 126mm
2021	GMC	Sierra 3500 HD	N/A	M14 x 2.00 x 126mm
2021	GMC	Yukon	N/A	M14 x 2.00 x 126mm
2021	GMC	Yukon XL	N/A	M14 x 2.00 x 126mm
2020	Cadillac	Escalade	N/A	M14 x 2.00 x 126mm
2020	Cadillac	Escalade ESV	N/A	M14 x 2.00 x 126mm
2020	Chevrolet	Cheyenne	N/A	M14 x 2.00 x 126mm
2020	Chevrolet	Silverado 1500	N/A	M14 x 2.00 x 126mm
2020	Chevrolet	Silverado 2500 HD	N/A	M14 x 2.00 x 126mm
2020	Chevrolet	Silverado 3500 HD	N/A	M14 x 2.00 x 126mm
2020	Chevrolet	Tahoe	N/A	M14 x 2.00 x 126mm
2020	GMC	Sierra	N/A	M14 x 2.00 x 126mm
2020	GMC	Sierra 1500	N/A	M14 x 2.00 x 126mm
2020	GMC	Sierra 2500 HD	N/A	M14 x 2.00 x 126mm
2020	GMC	Sierra 3500 HD	N/A	M14 x 2.00 x 126mm
2020	GMC	Yukon	N/A	M14 x 2.00 x 126mm
2020	GMC	Yukon XL	N/A	M14 x 2.00 x 126mm
2019	Cadillac	Escalade	N/A	M14 x 2.00 x 126mm
2019	Cadillac	Escalade ESV	N/A	M14 x 2.00 x 126mm
2019	Chevrolet	Cheyenne	N/A	M14 x 2.00 x 126mm
2019	Chevrolet	Silverado 1500	N/A	M14 x 2.00 x 126mm
2019	Chevrolet	Silverado 2500 HD	N/A	M14 x 2.00 x 126mm
2019	Chevrolet	Silverado 3500 HD	N/A	M14 x 2.00 x 126mm
2019	Chevrolet	Suburban 3500 HD	N/A	M14 x 2.00 x 126mm
2019	Chevrolet	Tahoe	N/A	M14 x 2.00 x 126mm
2019	GMC	Sierra	N/A	M14 x 2.00 x 126mm
2019	GMC	Sierra 1500	N/A	M14 x 2.00 x 126mm
2019	GMC	Sierra 2500 HD	N/A	M14 x 2.00 x 126mm
2019	GMC	Sierra 3500 HD	N/A	M14 x 2.00 x 126mm
2019	GMC	Yukon	N/A	M14 x 2.00 x 126mm
2019	GMC	Yukon XL	N/A	M14 x 2.00 x 126mm
2018	Cadillac	Escalade	N/A	M14 x 2.00 x 126mm
2018	Cadillac	Escalade ESV	N/A	M14 x 2.00 x 126mm
2018	Chevrolet	Cheyenne	N/A	M14 x 2.00 x 126mm
2018	Chevrolet	Silverado 1500	N/A	M14 x 2.00 x 126mm
2018	Chevrolet	Silverado 2500 HD	N/A	M14 x 2.00 x 126mm
2018	Chevrolet	Silverado 3500 HD	N/A	M14 x 2.00 x 126mm
2018	Chevrolet	Suburban 3500 HD	N/A	M14 x 2.00 x 126mm
2018	Chevrolet	Tahoe	N/A	M14 x 2.00 x 126mm
2018	GMC	Sierra	N/A	M14 x 2.00 x 126mm
2018	GMC	Sierra 1500	N/A	M14 x 2.00 x 126mm
2018	GMC	Sierra 2500 HD	N/A	M14 x 2.00 x 126mm
2018	GMC	Sierra 3500 HD	N/A	M14 x 2.00 x 126mm
2018	GMC	Yukon	N/A	M14 x 2.00 x 126mm
2018	GMC	Yukon XL	N/A	M14 x 2.00 x 126mm
2017	Cadillac	Escalade	N/A	M14 x 2.00 x 126mm
2017	Cadillac	Escalade ESV	N/A	M14 x 2.00 x 126mm
2017	Chevrolet	Cheyenne	N/A	M14 x 2.00 x 126mm
2017	Chevrolet	Silverado 1500	N/A	M14 x 2.00 x 126mm
2017	Chevrolet	Silverado 2500 HD	N/A	M14 x 2.00 x 126mm
2017	Chevrolet	Silverado 3500 HD	N/A	M14 x 2.00 x 126mm
2017	Chevrolet	Suburban 3500 HD	N/A	M14 x 2.00 x 126mm
2017	Chevrolet	Tahoe	N/A	M14 x 2.00 x 126mm
2017	GMC	Sierra	N/A	M14 x 2.00 x 126mm
2017	GMC	Sierra 1500	N/A	M14 x 2.00 x 126mm
2017	GMC	Sierra 2500 HD	N/A	M14 x 2.00 x 126mm
2017	GMC	Sierra 3500 HD	N/A	M14 x 2.00 x 126mm
2017	GMC	Yukon	N/A	M14 x 2.00 x 126mm
2017	GMC	Yukon XL	N/A	M14 x 2.00 x 126mm
2016	Cadillac	Escalade	N/A	M14 x 2.00 x 126mm
2016	Cadillac	Escalade ESV	N/A	M14 x 2.00 x 126mm
2016	Chevrolet	Cheyenne	N/A	M14 x 2.00 x 126mm
2016	Chevrolet	Silverado 1500	N/A	M14 x 2.00 x 126mm
2016	Chevrolet	Silverado 2500 HD	N/A	M14 x 2.00 x 126mm
2016	Chevrolet	Silverado 3500 HD	N/A	M14 x 2.00 x 126mm
2016	Chevrolet	Suburban 3500 HD	N/A	M14 x 2.00 x 126mm
2016	Chevrolet	Tahoe	N/A	M14 x 2.00 x 126mm
2016	GMC	Sierra	N/A	M14 x 2.00 x 126mm
2016	GMC	Sierra 1500	N/A	M14 x 2.00 x 126mm
2016	GMC	Sierra 2500 HD	N/A	M14 x 2.00 x 126mm
2016	GMC	Sierra 3500 HD	N/A	M14 x 2.00 x 126mm
2016	GMC	Yukon	N/A	M14 x 2.00 x 126mm
2016	GMC	Yukon XL	N/A	M14 x 2.00 x 126mm
2015	Cadillac	Escalade	N/A	M14 x 2.00 x 126mm
2015	Cadillac	Escalade ESV	N/A	M14 x 2.00 x 126mm
2015	Chevrolet	Cheyenne	N/A	M14 x 2.00 x 126mm
2015	Chevrolet	Silverado 1500	N/A	M14 x 2.00 x 126mm
2015	Chevrolet	Silverado 2500 HD	N/A	M14 x 2.00 x 126mm
2015	Chevrolet	Silverado 3500 HD	N/A	M14 x 2.00 x 126mm
2015	Chevrolet	Tahoe	N/A	M14 x 2.00 x 126mm
2015	GMC	Sierra	N/A	M14 x 2.00 x 126mm
2015	GMC	Sierra 1500	N/A	M14 x 2.00 x 126mm
2015	GMC	Sierra 2500 HD	N/A	M14 x 2.00 x 126mm
2015	GMC	Sierra 3500 HD	N/A	M14 x 2.00 x 126mm
2015	GMC	Yukon	N/A	M14 x 2.00 x 126mm
2015	GMC	Yukon XL	N/A	M14 x 2.00 x 126mm
2014	Cadillac	Escalade	N/A	M14 x 2.00 x 126mm
2014	Cadillac	Escalade ESV	N/A	M14 x 2.00 x 126mm
2014	Chevrolet	Cheyenne	N/A	M14 x 2.00 x 126mm
2014	Chevrolet	Silverado 1500	N/A	M14 x 2.00 x 126mm
2014	Chevrolet	Silverado 2500 HD	N/A	M14 x 2.00 x 126mm
2014	Chevrolet	Silverado 3500 HD	N/A	M14 x 2.00 x 126mm
2014	Chevrolet	Suburban 1500	N/A	M14 x 2.00 x 126mm
2014	Chevrolet	Tahoe	N/A	M14 x 2.00 x 126mm
2014	GMC	Sierra	N/A	M14 x 2.00 x 126mm
2014	GMC	Sierra 1500	N/A	M14 x 2.00 x 126mm
2014	GMC	Sierra 2500 HD	N/A	M14 x 2.00 x 126mm
2014	GMC	Sierra 3500 HD	N/A	M14 x 2.00 x 126mm
2014	GMC	Yukon	N/A	M14 x 2.00 x 126mm
2014	GMC	Yukon XL 1500	N/A	M14 x 2.00 x 126mm
2013	Cadillac	Escalade	N/A	M14 x 2.00 x 126mm
2013	Cadillac	Escalade ESV	N/A	M14 x 2.00 x 126mm
2013	Cadillac	Escalade EXT	N/A	M14 x 2.00 x 126mm
2013	Chevrolet	Avalanche	N/A	M14 x 2.00 x 126mm
2013	Chevrolet	Cheyenne	N/A	M14 x 2.00 x 126mm
2013	Chevrolet	Silverado 1500	N/A	M14 x 2.00 x 126mm
2013	Chevrolet	Silverado 2500 HD	N/A	M14 x 2.00 x 126mm
2013	Chevrolet	Silverado 3500 HD	N/A	M14 x 2.00 x 126mm
2013	Chevrolet	Suburban 1500	N/A	M14 x 2.00 x 126mm
2013	Chevrolet	Suburban 2500	N/A	M14 x 2.00 x 126mm
2013	Chevrolet	Tahoe	N/A	M14 x 2.00 x 126mm
2013	GMC	Sierra	N/A	M14 x 2.00 x 126mm
2013	GMC	Sierra 1500	N/A	M14 x 2.00 x 126mm
2013	GMC	Sierra 2500 HD	N/A	M14 x 2.00 x 126mm
2013	GMC	Sierra 3500 HD	N/A	M14 x 2.00 x 126mm
2013	GMC	Yukon	N/A	M14 x 2.00 x 126mm
2013	GMC	Yukon XL 1500	N/A	M14 x 2.00 x 126mm
2013	GMC	Yukon XL 2500	N/A	M14 x 2.00 x 126mm
2012	Cadillac	Escalade	N/A	M14 x 2.00 x 126mm
2012	Cadillac	Escalade ESV	N/A	M14 x 2.00 x 126mm
2012	Cadillac	Escalade EXT	N/A	M14 x 2.00 x 126mm
2012	Chevrolet	Avalanche	N/A	M14 x 2.00 x 126mm
2012	Chevrolet	Cheyenne	N/A	M14 x 2.00 x 126mm
2012	Chevrolet	Silverado 1500	N/A	M14 x 2.00 x 126mm
2012	Chevrolet	Silverado 2500 HD	N/A	M14 x 2.00 x 126mm
2012	Chevrolet	Silverado 3500 HD	N/A	M14 x 2.00 x 126mm
2012	Chevrolet	Suburban 1500	N/A	M14 x 2.00 x 126mm
2012	Chevrolet	Suburban 2500	N/A	M14 x 2.00 x 126mm
2012	Chevrolet	Tahoe	N/A	M14 x 2.00 x 126mm
2012	GMC	Sierra	N/A	M14 x 2.00 x 126mm
2012	GMC	Sierra 1500	N/A	M14 x 2.00 x 126mm
2012	GMC	Sierra 2500 HD	N/A	M14 x 2.00 x 126mm
2012	GMC	Sierra 3500 HD	N/A	M14 x 2.00 x 126mm
2012	GMC	Yukon	N/A	M14 x 2.00 x 126mm
2012	GMC	Yukon XL 1500	N/A	M14 x 2.00 x 126mm
2012	GMC	Yukon XL 2500	N/A	M14 x 2.00 x 126mm
2011	Cadillac	Escalade	N/A	M14 x 2.00 x 126mm
2011	Cadillac	Escalade ESV	N/A	M14 x 2.00 x 126mm
2011	Cadillac	Escalade EXT	N/A	M14 x 2.00 x 126mm
2011	Chevrolet	Avalanche	N/A	M14 x 2.00 x 126mm
2011	Chevrolet	Cheyenne	N/A	M14 x 2.00 x 126mm
2011	Chevrolet	Silverado 1500	N/A	M14 x 2.00 x 126mm
2011	Chevrolet	Silverado 2500 HD	N/A	M14 x 2.00 x 126mm
2011	Chevrolet	Silverado 3500 HD	N/A	M14 x 2.00 x 126mm
2011	Chevrolet	Suburban 1500	N/A	M14 x 2.00 x 126mm
2011	Chevrolet	Suburban 2500	N/A	M14 x 2.00 x 126mm
2011	Chevrolet	Tahoe	N/A	M14 x 2.00 x 126mm
2011	GMC	Sierra	N/A	M14 x 2.00 x 126mm
2011	GMC	Sierra 1500	N/A	M14 x 2.00 x 126mm
2011	GMC	Sierra 2500 HD	N/A	M14 x 2.00 x 126mm
2011	GMC	Sierra 3500 HD	N/A	M14 x 2.00 x 126mm
2011	GMC	Yukon	N/A	M14 x 2.00 x 126mm
2011	GMC	Yukon XL 1500	N/A	M14 x 2.00 x 126mm
2011	GMC	Yukon XL 2500	N/A	M14 x 2.00 x 126mm
2010	Cadillac	Escalade	N/A	M14 x 2.00 x 126mm
2010	Cadillac	Escalade ESV	N/A	M14 x 2.00 x 126mm
2010	Cadillac	Escalade EXT	N/A	M14 x 2.00 x 126mm
2010	Chevrolet	Avalanche	N/A	M14 x 2.00 x 126mm
2010	Chevrolet	Cheyenne	N/A	M14 x 2.00 x 126mm
2010	Chevrolet	Silverado 1500	N/A	M14 x 2.00 x 126mm
2010	Chevrolet	Silverado 2500 HD	N/A	M14 x 2.00 x 126mm
2010	Chevrolet	Silverado 3500 HD	N/A	M14 x 2.00 x 126mm
2010	Chevrolet	Suburban 1500	N/A	M14 x 2.00 x 126mm
2010	Chevrolet	Suburban 2500	N/A	M14 x 2.00 x 126mm
2010	Chevrolet	Tahoe	N/A	M14 x 2.00 x 126mm
2010	GMC	Sierra	N/A	M14 x 2.00 x 126mm
2010	GMC	Sierra 1500	N/A	M14 x 2.00 x 126mm
2010	GMC	Sierra 2500 HD	N/A	M14 x 2.00 x 126mm
2010	GMC	Sierra 3500 HD	N/A	M14 x 2.00 x 126mm
2010	GMC	Yukon	N/A	M14 x 2.00 x 126mm
2010	GMC	Yukon XL 1500	N/A	M14 x 2.00 x 126mm
2010	GMC	Yukon XL 2500	N/A	M14 x 2.00 x 126mm
2009	Cadillac	Escalade	N/A	M14 x 2.00 x 126mm
2009	Cadillac	Escalade ESV	N/A	M14 x 2.00 x 126mm
2009	Cadillac	Escalade EXT	N/A	M14 x 2.00 x 126mm
2009	Chevrolet	Avalanche	N/A	M14 x 2.00 x 126mm
2009	Chevrolet	Cheyenne	N/A	M14 x 2.00 x 126mm
2009	Chevrolet	Silverado 1500	N/A	M14 x 2.00 x 126mm
2009	Chevrolet	Silverado 2500 HD	N/A	M14 x 2.00 x 126mm
2009	Chevrolet	Silverado 3500 HD	N/A	M14 x 2.00 x 126mm
2009	Chevrolet	Suburban 1500	N/A	M14 x 2.00 x 126mm
2009	Chevrolet	Suburban 2500	N/A	M14 x 2.00 x 126mm
2009	Chevrolet	Tahoe	N/A	M14 x 2.00 x 126mm
2009	GMC	Sierra	N/A	M14 x 2.00 x 126mm
2009	GMC	Sierra 1500	N/A	M14 x 2.00 x 126mm
2009	GMC	Sierra 2500 HD	N/A	M14 x 2.00 x 126mm
2009	GMC	Sierra 3500 HD	N/A	M14 x 2.00 x 126mm
2009	GMC	Yukon	N/A	M14 x 2.00 x 126mm
2009	GMC	Yukon XL 1500	N/A	M14 x 2.00 x 126mm
2009	GMC	Yukon XL 2500	N/A	M14 x 2.00 x 126mm
2008	Cadillac	Escalade	N/A	M14 x 2.00 x 126mm
2008	Cadillac	Escalade ESV	N/A	M14 x 2.00 x 126mm
2008	Cadillac	Escalade EXT	N/A	M14 x 2.00 x 126mm
2008	Chevrolet	Avalanche	N/A	M14 x 2.00 x 126mm
2008	Chevrolet	Cheyenne	N/A	M14 x 2.00 x 126mm
2008	Chevrolet	Silverado 1500	N/A	M14 x 2.00 x 126mm
2008	Chevrolet	Silverado 2500 HD	N/A	M14 x 2.00 x 126mm
2008	Chevrolet	Silverado 3500 HD	N/A	M14 x 2.00 x 126mm
2008	Chevrolet	Suburban 1500	N/A	M14 x 2.00 x 126mm
2008	Chevrolet	Suburban 2500	N/A	M14 x 2.00 x 126mm
2008	Chevrolet	Tahoe	N/A	M14 x 2.00 x 126mm
2008	GMC	Sierra	N/A	M14 x 2.00 x 126mm
2008	GMC	Sierra 1500	N/A	M14 x 2.00 x 126mm
2008	GMC	Sierra 2500 HD	N/A	M14 x 2.00 x 126mm
2008	GMC	Sierra 3500 HD	N/A	M14 x 2.00 x 126mm
2008	GMC	Yukon	N/A	M14 x 2.00 x 126mm
2008	GMC	Yukon XL 1500	N/A	M14 x 2.00 x 126mm
2008	GMC	Yukon XL 2500	N/A	M14 x 2.00 x 126mm
2007	Cadillac	Escalade	N/A	M14 x 2.00 x 126mm
2007	Cadillac	Escalade ESV	N/A	M14 x 2.00 x 126mm
2007	Cadillac	Escalade EXT	N/A	M14 x 2.00 x 126mm
2007	Chevrolet	Avalanche	N/A	M14 x 2.00 x 126mm
2007	Chevrolet	Cheyenne	N/A	M14 x 2.00 x 126mm
2007	Chevrolet	Silverado 1500	N/A	M14 x 2.00 x 126mm
2007	Chevrolet	Silverado 1500 Classic	N/A	M14 x 2.00 x 126mm
2007	Chevrolet	Silverado 2500 HD	N/A	M14 x 2.00 x 126mm
2007	Chevrolet	Silverado 2500 HD Classic	N/A	M14 x 2.00 x 126mm
2007	Chevrolet	Silverado 3500 HD	N/A	M14 x 2.00 x 126mm
2007	Chevrolet	Suburban 1500	N/A	M14 x 2.00 x 126mm
2007	Chevrolet	Suburban 2500	N/A	M14 x 2.00 x 126mm
2007	Chevrolet	Tahoe	N/A	M14 x 2.00 x 126mm
2007	GMC	Sierra	N/A	M14 x 2.00 x 126mm
2007	GMC	Sierra 1500	N/A	M14 x 2.00 x 126mm
2007	GMC	Sierra 1500 Classic	N/A	M14 x 2.00 x 126mm
2007	GMC	Sierra 2500 HD	N/A	M14 x 2.00 x 126mm
2007	GMC	Sierra 2500 HD Classic	N/A	M14 x 2.00 x 126mm
2007	GMC	Sierra 3500 HD	N/A	M14 x 2.00 x 126mm
2007	GMC	Yukon	N/A	M14 x 2.00 x 126mm
2007	GMC	Yukon XL 1500	N/A	M14 x 2.00 x 126mm
2007	GMC	Yukon XL 2500	N/A	M14 x 2.00 x 126mm
2006	Cadillac	Escalade	N/A	M14 x 2.00 x 126mm
2006	Cadillac	Escalade ESV	N/A	M14 x 2.00 x 126mm
2006	Cadillac	Escalade EXT	N/A	M14 x 2.00 x 126mm
2006	Chevrolet	Avalanche 1500	N/A	M14 x 2.00 x 126mm
2006	Chevrolet	Avalanche 2500	N/A	M14 x 2.00 x 126mm
2006	Chevrolet	Cheyenne	N/A	M14 x 2.00 x 126mm
2006	Chevrolet	Silverado 1500	N/A	M14 x 2.00 x 126mm
2006	Chevrolet	Silverado 2500 HD	N/A	M14 x 2.00 x 126mm
2006	Chevrolet	Suburban 1500	N/A	M14 x 2.00 x 126mm
2006	Chevrolet	Suburban 2500	N/A	M14 x 2.00 x 126mm
2006	Chevrolet	Tahoe	N/A	M14 x 2.00 x 126mm
2006	GMC	Sierra 1500	N/A	M14 x 2.00 x 126mm
2006	GMC	Sierra 2500 HD	N/A	M14 x 2.00 x 126mm
2006	GMC	Yukon	N/A	M14 x 2.00 x 126mm
2006	GMC	Yukon XL 1500	N/A	M14 x 2.00 x 126mm
2006	GMC	Yukon XL 2500	N/A	M14 x 2.00 x 126mm

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

115160781156254711562587

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.