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Description
2011-2019 GM HD 6.5" FOX 2.5 Performance Conversion Kit (BDS727FDSC)BDS is a game changer for your 2011 2019 Chevy Silverado and GMC Sierra 2500 HD with this 6. 5" suspension lift kit and FOX 2. 5 Coil Over conversion, with clearance for up to 37" tires. The high clearance design improves ground clearance, strength, and offroad protection. Up front it uses FOX 2. 5 coil over shocks, heavy duty tubular upper control arms (1. 5" OD x . 120 wall, TIG welded, indexed ball joint cup for added down travel and camber
BDS is a game changer for your 2011-2019 Chevy Silverado and GMC Sierra 2500 HD with this 6.5" suspension lift kit and FOX 2.5 Coil-Over conversion, with clearance for up to 37" tires. The high-clearance design improves ground clearance, strength, and offroad protection. Up front it uses FOX 2.5 coil-over shocks, heavy duty tubular upper control arms (1.5" OD x .120-wall, TIG welded, indexed ball joint cup for added down travel and camber adjustment), fully boxed and gusseted high strength lower control arms with greaseable ball joints, 1/4" thick high-arched steel crossmembers, multipiece differential relocation brackets, and heavy duty skid plates, with CNC-machined ductile iron steering knuckles, sway bar links, bump stop extensions, stainless brake lines, and CV spacers. The rear uses replacement lift blocks, a u-bolt flip kit for max clearance, and FOX 2.0 Performance Series shocks.
Features
- FOX 2.5 coil-overs offer improved damper performance over stock
- Dual Speed Compression Adjust adjuster allows easy high-speed and low-speed compression tuning for optimal performance in any terrain
- Performance UCAs increase strength and allow for more suspension travel
- High clearance design w/ no torsion bar drop maximizes ground clearance
- Robust steering knuckles maintain ESC system compliance
- HD skid plate system improves offroad protection
- Multipoint differential relocation brackets to secure the front axle and improve CV angles
- Factory Protection Plus drivetrain warranty included
Specs
- Front Lift Method: Cross-Member
- Rear Lift Method: Block
- Shocks Included: Yes
- Front Lift Height: 6.5 Inch
- Rear Lift Height: 5 Inch
Recommended Tire & Wheel Fitment
- Tire Size: 37x12.5
- Wheel Diameter: 18x9, 20x9
- Back Spacing: 4.625/5.5
Notes
- A torsion bar tool is required to unload the torsion bars.
- Requires frame bracket and differential modification.
- Minor welding is required for coil-over mount installation.
- Stock 17 inch & 18 inch wheels cannot be reinstalled.
- Stock 20 inch x 8.5 inch wheels with 6 inch backspacing or less will fit with a max tire size of 35x12.50.
- Models with two piece rear driveshaft may require carrier bearing drop kit (121612).
- Coilovers are preset for DIESEL engine models. Use on GAS engine models is not recommended due to providing too much lift; available preload adjustment is typically not enough to achieve desired ride height.
- Will NOT fit dually applications.
- 3 inch block will result in a slightly tail-low stance.
- 5 inch block will result in a level to slightly tail high stance and integrates a u-bolt flip kit with new spring plate.
Includes
- BDS021251, 2011-2019 Chevrolet Silverado 2500HD LCA Kit - Drv (UPC 658848614523)
- BDS021252, 2011-2019 Chevrolet Silverado 2500HD LCA Kit - Pass (UPC 658848614530)
- BDS021509, 11 GM HD Rear 5in System (UPC 658848614745)
- BDS021650, 11 GM HD 4.5-6.5in System (1of4) (UPC 658848614950)
- BDS021651, 11 GM HD 4.5-6.5in System (2of4) (UPC 658848614967)
- BDS021652, 11 GM HD 4.5-6.5in System (3of4) (UPC 658848614974)
- BDS021655, 11-up Chevy HD 6.5 Coil Over Box Kit (4of4) (UPC 658848615001)
- BDS121250, 2011-2019 Chevrolet Silverado 2500HD UCA Kit (UPC 658848618910)
- BDS121650, 2001-2019 GM HD Front Skid Plate Box Kit (UPC 658848619207)
- BDS121653, 11-up Chevy HD 6.5in Coil Over Mounting Kit (UPC 658848619238)
- FOX88406155, Kit: BDS 11-19 GM 2500/3500 HD Front Coilover, 2.5 Series, R/R 6.5 Inch Lift, Dual Speed Compression Adjust (UPC 814897013629)
- FOX98224769, Fox 2.0 Shock 31.02 x 18.95 x 2- EB1/EB1
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
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4.9 ★★★★★
Based on 1941 reviews
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Product Reviews
★★★★★ 5
3rd Update! See review... Good stuff and works as advertised...
Update - 3rd oil change/flush. Engine oil draining from engine is waaaay cleaner than my first flush. Probably won't need to do a 4th time for several changes. I added Ceratec at this change and am amazed how much better the engine performs since my initial flush. Less clatter and very smooth idle. (Jeep 4.0 I6)
Update- 2nd change and used the flush again. About 7000 miles from first use. The oil was cleaner and less "gunky" as first time but oil was definitely dirtier than normal. Right away noticed off idle throttle response improved. Then on a drive I take regularly with a mountain pass and long downhill I noticed that even tho the jeep downshifted out of OD it took much less throttle to hold 65 up a long grade. On the downhill normally I would see 50-60 mpg max on the digital readout. This time. It went to 99 which to me indicates more vaccum below the throttle plate. My guess is the rings freed up a bit more than the first flush and highway mileage is up to 23+ where I would get 21 before. Nice!
Used in 2001 Jeep Grand Cherokee. 140k miles and a ticking lifter (common in the 4.0 - 6 cylinder...). Definitely cleaned sludge (oil filter very heavy!) and oil was dark when draining. Idles smoother, oil stays cleaner longer, slight oil pressure increase and runs cooler. The lifter still ticks but probably a cam lobe issue. Will use it after 7500 miles or 1 year. Will report back after next change.
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Reviewed in the United States on February 22, 2017
★★★★★ 5
Tips and tricks
I watched several videos by professionals who used this. Follow instructions. Make sure the engine is warm before you put it in. Make sure you have everything you need. The biggest tip I got that was repeatedly emphasized by the pros was to buy a “cheap” oil in addition to the new oil. After you run the flush drain the oil and flush. Put the cheap oil in and “rinse” the inside of the engine with the cheap oil. Then drain again. Replace the oil and filter with your good stuff.
I followed these instructions or suggestions and….
I sat in the truck while the flush was running. It’s a 13 year old truck with 150,000 miles. It was running strong but burning oil and kind of loud. Sounded like it was growling. There were some ticking type noises that made me nervous. As I sat in the truck and let the flush cycle through the engine at idle I could literally hear the flush working. Very slowly it was like someone gave the engine a Xanax and you could hear it getting quieter and calming down.
I drained, rinsed with cheap oil only letting the cheap oil run through at idle for another 15 minutes then drained again. The oil flush was clearly important. It didn’t come out as black as the first drain but it looked like old nasty oil.
The truck is no longer burning oil. My gas mileage has increased significantly and it is running so quiet and smooth it’s unbelievable. I used a little less of the liquid Molly flush than it called for regarding the flush to oil ratio. I didn’t want to do something too intense to the inside of the engine. But the results were remarkable. Just as advertised after following the instructions. I also added the liquid Molly oil additive to the final oil change to ‘lube’ the inside of the engine. I plan to do another flush in about 10,000 miles.
All that to say, yes, you won’t be disappointed as long as you follow instructions and a few tips and tricks. My truck is almost running like a brand new truck and again it’s an old and tired truck. I will use this as part of a high mileage maintenance and perform the flush every 50,000 miles or so. I feel confident it will extend the life of my engine based on the results
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Reviewed in the United States on February 9, 2024
★★★★★ 4
Seems to have helped
Bought a used 2020 Jeep Sahara 2 liter turbo charged with 80k miles from a dealership. Dealership had just changed oil the day of purchase. Drove it home 30 miles down interstate and another 20 back roads, it ticked and tapped allot at idle and the dip stick was varnished.
I added the flush, let it idle for 10 minutes and drained it. The new oil from the dealership drained out jet black, no light could pass thru it.
I changed the oil with Walmart oil and a cheap oil filter and let it idle for 5 minutes to clean out all the engine flush, it drained out clean and clear.
I refilled it with Pennzoil Platinum High Mileage oil and a Fram Ultra Synthetic oil filter. It's been a week and the engine is noticeably quieter and smoother since using this product.
If nothing else it cleaned allot of carbon from inside of my engine.
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Reviewed in the United States on September 25, 2025
★★★★★ 5
HOLY CRAP!!!!
So my 2005 Durango has a 5.7 and I put on 253,000 miles on it before it blew a head gasket. Since it was summer, iI decided I'd tackle it myself. The upper end was so full of gunk, I can't believe I hadn't had serious issues. Anyway, I apparently dropped some pieces of crud down the oil channels, 'cuz after putting it all back together, I got alarms for low oil pressure. Figuring I'd try anything else before replacing the oil pump, i gave this stuff a try. WOW!!!! Not only did the oil pressure return, the engine runs SO much smoother! I had forgotten how smooth it ran when it was new. The caveat is that apparently the gunk was the only thing keeping some areas from leaking - as it lost oil at a startling rate. 1 bottle of the Liqui Oil Saver though, and within a week the oil leaks completely stopped.
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Reviewed in the United States on November 8, 2025
★★★★★ 5
Awesome!!
Had a check engine light come on for cam shaft position. Did some research online about the specific code and found that I could be due to sludge in the engine. Added this and ran for about 30 minutes and then had the oil changed.
The light never came back on and the engine is running smooth and quiet.
Will definitely use again.
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Reviewed in the United States on April 5, 2026