Red Line RL-2 Diesel Ignition Improver

Use the specifications and images on this page together with your vehicle details. Match part number RED-70303 to your existing component or OEM interchange.

Explore similar Fluids & Lubricants to find the right fit for your car, truck, SUV, or powersports vehicle. See more Red Line products we carry.

Red Line RL-2 Diesel Ignition Improver from Red Line is intended for normal automotive service and maintenance—such as brake pad and rotor service, oil and filter changes, or other listed applications—depending on how this SKU is categorized. Follow your owner’s manual and any torque or fluid specs printed on the packaging.

Discover complementary items in our Fluids & Lubricants collection and Additives.

This listing is an aftermarket replacement manufactured or branded by Red Line, engineered to meet or exceed typical OEM performance for the applications described. It is not necessarily a dealer-original part unless the description states otherwise.

Compare alternatives in Fluids & Lubricants if you need a different formulation, kit, or price point.

You receive the Red Line RL-2 Diesel Ignition Improver (SKU / part number RED-70303) as shown in the photos and bullet points. Kits may include filters, gaskets, hardware, or fluids; single components include only that item. Open the Specifications and Includes areas on this page to confirm quantity and contents.

Installation steps depend on the part type (for example, brake pads versus an oil change kit). Work on a cool vehicle, use proper jack stands and tools, torque fasteners to spec, and bed brakes or prime filters per the manufacturer’s instructions. If you are not experienced with suspension or brake work, use a licensed technician.

Find related service items in Fluids & Lubricants. You may also consider Red Line Diesel WaterWetter® - 15 oz or Red Line 85 Plus Diesel Fuel Additive - 1 Gallon.

New, uninstalled items are generally eligible for return within the time window posted in our store policies, provided they are in resalable condition. Reference your order and SKU RED-70303 when contacting support. Defective or incorrect shipments should be reported promptly with photos when possible.

Need a different fitment? Browse Fluids & Lubricants for other compatible options.

Many in-stock orders ship the same business day when placed before the warehouse cutoff. Transit usually takes about 2–5 business days in the contiguous U.S., depending on carrier and destination. Availability is shown near the add-to-cart button on this page.

Shop additional in-stock choices in Fluids & Lubricants.

Cross-check year, make, model, engine, and trim with the fitment data on this page, your old part number, and SKU RED-70303. When in doubt, verify with a dealer parts catalog or qualified mechanic before opening packaging.

Similar listings: Red Line Diesel WaterWetter® - 15 oz and Red Line 85 Plus Diesel Fuel Additive - 1 Gallon. Explore the full Fluids & Lubricants category for oil change kits, brake parts, filters, and more.