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5 Element Railer Rear Diffuser for Lotus Elise & Exige


Weight: 11 lbs
Cutting/Drilling Required?: No. Direct Replacement.
Compatibilty: 2005-2010 Elise, 2006+ Exige and Cup Car
Description: This is the bigger version of the “Railer Jr.”. Add an inch to the body length and an inch to the depth of the fins and you end up with an aggressive diffuser that is geared towards track use, but can be used on the street with caution. Works with any exhaust.

SKU: N/A Categories: ,

Product Description

• Direct OEM replacement for 05-10 Elise and 06+ Exige.
• Comes WITH or WITHOUT exhaust hole cutout (specify below).
• No drilling or modification required. 15 minute installation.
• Built from aluminum and powdercoated matte black.
• Weighs only 11 lbs (5.5 kg).
• Stronger and thicker than OEM to handle curb rash and track abuse.
Frequently Asked Questions about this diffuser.
• Our most popular Track Diffuser!

Diffuser body is 3 in” (7.5 cm) longer than OEM diffuser. Fins sit 4 in” (10.5 cm) off the ground on stock suspension. Fins run parallel to the ground and extend forward to the undertray to channel air properly out the rear of the car. This reduces drag and improves downforce. Fins are squared off to keep air channeled in between the fins longer, preventing air spill. This is a great track diffuser.

Additional Information

Weight 16 lbs
Dimensions 50 x 30 x 10 in
Railer Diffuser

Difflow 5 Element Railer Diffuser, Difflow 5 Element Railer Diffuser WITH AeroPlates

Exhaust Hole Cutout

No, my exhaust exits over the diffuser., Yes, my exhaust goes through the diffuser.

Lotus Year Model

2005-2010 Elise, 2006-2008 Exige, 2009-2011 Exige