EPI Heavy Duty Suspension Spring WE320020 | ATV/UTV Shock Spring Upgrade

Upgrade your ATV or UTV suspension with this EPI Heavy Duty Suspension Spring (Part #04310291 / Vendor #WE320020) — engineered for superior strength, durability, and improved load-carrying performance. Built from high-quality chrome silicon steel, this heavy duty spring is roughly 25-30 % stronger than stock, making it perfect for work machines, added accessories (plows, winches, trailers) or riders needing extra support and stability.

Product Specifications:

• Brand: EPI Performance

• OEM Part Number: 04310291

• Vendor Part Number: WE320020

• Spring Rate: Heavy Duty, ~336 lb/in

• Colour: Black

• Condition: New heavy duty replacement spring

• Sold Individually

Key Features:

• High-quality chrome silicon construction for long life

• Designed to be stronger and more durable than OEM stock springs

• Reduces suspension sag under load

• Ideal for utility use and heavy accessories

Fitment / Compatibility Highlights

This heavy duty spring is a direct replacement option on a range of popular ATV/UTV models. Confirm fitment with vehicle specifications before purchase — some listings show broad compatibility such as:

✔ Can-Am / Bombardier Outlander

• Outlander 400 / XT (2003–2008)

• Outlander 400 4x4 (2003–2009)

✔ Polaris Ranger

• Ranger 500 (2005–2009)

• Ranger 500 4x4 / 2x4 (2005–2007)

• Ranger 700 XP (2005–2009)

✔ Polaris Outlander / Other Models (reported fitment on some listings)

• Outlander 400 (various years)

• Ranger 500 variants (front/rear)

(Fitment above is representative. Please verify exact year/model compatibility using your vehicle’s spec or ask us before buying.)