The PLM Heat Exchanger XL PLM-MSL55-HEAT-EXCHANGER-XL is designed to handle the extreme heat generated by supercharged Mercedes-Benz SL55 AMG 5.5L engines. This upgraded version is 25% larger than the standard, giving your car the cooling power it needs under intense performance conditions.

With 2.25 liters of fluid capacity and an impressive 4000 in² of fin surface, it’s engineered to reduce intake air temperatures (IAT) and help eliminate heat soak—keeping your power levels consistent when it matters most.

Built from 100% TIG-welded aluminum, and furnace brazed with CNC billet necks, it offers a lightweight, durable, and efficient cooling upgrade that installs without cutting or modification.

VEHICLE FITMENT

• Mercedes-Benz SL55 AMG – 5.5L Supercharged

Note: Direct bolt-on for E55. SL55 requires 2 bracket holes and a longer hose (included free if you select SL55 option at checkout).

DIMENSIONS & SPECS

• Overall Length: 35.5"

• Core Size (without tanks): 28.5"

• Height: 5.5"

• Core Thickness (XL): 3.0"

• Core Thickness (Standard): 2.5"

• Fluid Capacity: 2.25 liters

• Fin Surface Area: 4000 in²

KEY FEATURES

• 25% bigger than PLM standard exchanger

• Designed specifically for SL55 cooling challenges

• CNC-machined billet aluminum necks

• Non-epoxied furnace brazed core

• High-density fin design for maximum heat transfer

• All aluminum construction

• 100% TIG-welded for strength and durability

• No cutting or vehicle modification required

• Maintains consistent IAT under high-performance use

INSTALLATION INFO

• Direct bolt-on for E55 fitment

• SL55 requires drilling 2 holes in mounting brackets (vehicle remains unmodified)

• SL55 uses a longer hose (included free when selected at checkout)

• Basic hand tools required

• Bumper removal required for installation

Optional Upgrade: Save time and maximize cooling by bundling with PLM’s Johnson CM30 pump and Redline Water Wetter for just $100 more. Available HERE