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Ships within 48 hours · Estimated delivery Aug 7 - Aug 12
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
2010-2013 Ram HD Ram 3 Inch Long Arm System Diesel (SYN8503-13)Synergy Dodge 2500 3500 3 Inch Long Arm Suspension System is Engineered and manufactured in the USA. The 3 Inch Dodge Long Arm System is designed for increased performance, stability, and ride quality both on and off road. The massive 2 inch diameter Front Lower Long Arms offer best in class ground clearance and allow the use of larger tires without rubbing. No bump stop spacers required. Long arms and track bar feature zero maintenance Dual Durometer
Synergy Dodge 2500/3500 3 Inch Long Arm Suspension System is Engineered and manufactured in the USA. The 3 Inch Dodge Long Arm System is designed for increased performance, stability, and ride quality both on and off road. The massive 2 inch diameter Front Lower Long Arms offer best in class ground clearance and allow the use of larger tires without rubbing. No bump stop spacers required. Long arms and track bar feature zero maintenance Dual Durometer Bushings (DDB) for increased longevity and vibration dampening. This system will lift the truck 3.0 inch and accommodate up to 37 inch tall tires.
Features:
- Progressive wound coil spring manufactured using the latest in CNC hot winding technology for optimized on and off road performance
- Heavy duty sway-bar links correct sway bar geometry and maximize stability
- Heavy duty rear shackles provide a minimal amount of lift while keeping the rear driveline angles correct
- Synergy double adjuster sleeve pinch bolt assembly allows for adjustment of control arm and track bar length without removal
- Heavy duty front track bar made from high quality 1.5X.250 inch Wall 1026 DOM tubing allows centering of front axle when using a suspension lift
- Lower adjustable long arms are manufactured from high quality crush resistant 2.00X.250 inch Wall 1026 DOM tubing
- Upper adjustable control arms are manufactured from high quality crush resistant 1.75X.188 inch Wall 1026 DOM tubing
- Long arms feature Synergy Dual Durometer Bushings (DDB) with Teflon bearing surface for a maintenance free design focusing on performance, flex, longevity, and ride quality.
- Long arms incorporate the tried and true Johnny Joints for paramount performance durability
- Rear add-a-leaf pack is a progressive 5 leaf design that replaces the factory overload spring for improved ride both on and off road
- Cam Bolt Eliminator Kit takes the place of stock control arm cam bolts when upgrading to adjustable control arms for improved reliability
- Suspension components feature an abrasion-resistant Powdercoat finish for maximum durability and corrosion resistance
Fits:
- 2010-2013 Dodge 2500 4x4 Diesel
- 2010-2012 Dodge 3500 4x4 Diesel
Kit Includes:
- 8515-11 Synergy Front Sway Bar Links
- 8555-30-HD Synergy Front 3.0 inch Coil Springs
- 8566-01 Synergy 1.0 inch Lift Rear Shackles
- 8550-11 Synergy Adjustable Front Track Bar
- 8581 Synergy Long Arm Brackets
- 8583-04 Synergy Adjustable Front Lower Long Arms
- 8585 Synergy Adjustable Front Upper Long Arms
- 8516-02-400 Synergy Rear Add-A-Leaf Pack
- 8565-03 Synergy Cam Bolt Eliminator Kit
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
- If time is of the essence, please consider selecting expedited delivery for faster service.
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]
- Please click here for more details>>> Return & Exchange Policy
4.6 ★★★★★
Based on 17 reviews
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Product Reviews
★★★★★ 5
Saved me so much money
Im loving this mattress topper. It has added a noticeable layer of comfort to my firm mattress without making it feel too soft. The cushion is plush yet supportive and has made sleeping more comfortable overall.
The bamboo feels soft and breathable. It fits on the mattress with the deep pockets and stays in place alk night. Setup was easy and it fluffed up after unpacking.
If you have a firm mattress and want extra comfort without replacing it, this topper is a great option. Highly recommend
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Reviewed in the United States on December 29, 2025
★★★★★ 5
Comfortable, cooling, and OEKO-TEX certified, it’s a great way to refresh any mattress.
This 3-inch mattress topper instantly upgraded my bed with a softer, cooler, and more supportive feel. The bamboo-viscose fabric is noticeably breathable, helping regulate heat throughout the night—great for hot sleepers. The 1200GSM down-alternative fill adds plush, cloud-like cushioning while still offering balanced support for the back and shoulders. It fits securely with the deep pockets and stays in place even when turning. After allowing it to fully expand, the topper fluffs up beautifully. Comfortable, cooling, and OEKO-TEX certified, it’s a great way to refresh any mattress.
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Reviewed in the United States on December 8, 2025
★★★★★ 5
Great upgrade for a rental apartment mattress
The mattress in my rental place is firm to the point where it almost feels unfinished. Instead of replacing it, I decided to try adding this topper. It made an immediate difference in the way the bed feels when I sit or lie down. There’s a nice cushioned layer that softens that “flat” feeling but still holds its shape. Another thing I noticed is how breathable it is. I expected thick padding to feel warm, but the airflow here feels better than the original mattress surface. Even after moving around, it never felt heavy or stuffy.
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Reviewed in the United States on November 22, 2025
★★★★★ 5
Soft and Comfortable Topper
I got this bamboo mattress topper for a small single bed we keep in our guest room, but I ended up testing it out myself first. The material feels soft and breathable, which is nice because that room can get a little warm in the afternoons. It adds a good amount of cushioning without making the bed too soft. After a couple of nights, my back actually felt better compared to the old mattress alone. I also appreciate that it’s machine washable, because our guest room sometimes doubles as a nap spot for my son after swim class, and spills happen. It dried pretty quickly in the dryer and kept its shape. Overall, it made the bed feel much more comfortable and fresh.
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Reviewed in the United States on November 24, 2025
★★★★★ 5
Added comfort for someone working night shifts
I work odd hours, so my sleep schedule is all over the place. My mattress has always felt a bit too stiff after long shifts, so I got this topper hoping it would help me relax faster. It really changed the overall feel of the bed. The padding has a cushioned lift that makes lying down feel smoother, especially around the shoulders and lower back. Instead of feeling like I’m dropping onto a firm surface, there’s a soft layer that evens out the pressure. What surprised me most is how light the surface feels. Even after staying in one position, it never gets stuffy or heavy. The airflow makes a difference when your body is trying to wind down after work. The fitted pocket also stays tight around the mattress, so nothing shifts when I move. I can stretch out without worrying about the topper sliding off.
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Reviewed in the United States on November 24, 2025