2020-2023 L5P Duramax DIY Performance Package

Unlock the full potential of your 2020-2023 L5P Duramax with the SNO Diesel Performance DIY Performance Package — everything you need to delete, tune, and dominate, shipped straight to your door.

What's Included

• PEAKSIDE PERFORMANCE ECM Tune — precision-calibrated for your L5P via HP Tuners
• 4 HP Tuners Credits — required to flash your ECM
• HP Tuners MPVI4 Device — the industry-standard tuning interface. No unlock box required for 2019+ — the MPVI4 unlocks and flashes your ECM directly.
• FLO-PRO Downpipe-Back Exhaust — proudly Canadian made, built to last
• FLO-PRO Downpipe — Canadian made, bolt-on fitment for 20-23 L5P
• CAN Bus Plugs — Made in the USA

Available Power Levels

• Stock Delete — emissions equipment removed, factory power retained
• +50 HP
• +75 HP
• +90 HP
• +120 HP
• +150 HP

Higher power levels are available with proper supporting modifications. Please state your desired HP level and supporting modifications in the order notes.

ECM Tuning Options

• Single Tune — one precision-calibrated file loaded to your MPVI4 for your chosen power level.
• SOTF (Shift On The Fly) — multiple power levels you can switch between on the fly. By default, SOTF uses the Cruise Control Method — accessed via your steering wheel controls (no additional hardware required). If you prefer a manual toggle switch, select the SOTF Switch add-on at checkout. If no switch is selected, your tuning will default to the Cruise Control Method.

💻 This kit requires a Windows computer to download HP Tuners VCM Suite. Download VCM Suite Beta Version here.

Once you receive your kit, email your stock read files to sales@peaksideperformance.ca to get your tune built.

Exhaust Options

Available in 4" or 5", aluminized or stainless steel, with or without muffler — Canadian made by FLO-PRO, engineered for performance and durability.

Optional Add-Ons

• Harness Plug Kit (+$129.99) — USA-made plug-and-play harness plugs
• TCM Tuning (+$679.95) — includes TCM tune + 4 additional HP Tuners Credits (8 credits total) for maximum transmission performance and longevity

This is the package built for the diesel enthusiast who wants it done right. Quality parts, proven tuning, and the satisfaction of doing it yourself.

⚠️ Disclaimer: This product is intended for off-road use only. Removal or modification of emissions control equipment (DPF, DEF, EGR) is illegal for use on public roads and may violate federal, provincial, and local emissions regulations. SNO Diesel Performance does not condone the use of this product in violation of any applicable laws. By purchasing, the customer acknowledges that this product is for off-road, competition, or racing use only. All emissions equipment must remain intact for street-driven vehicles.