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These modules are developed with real-world testing on working diesel engines. They are calibrated for safe, reliable performance gains without compromising engine longevity or leaving an ECM footprint. Whether you're towing heavy or just looking for better drivability, these modules deliver safe, measurable results in both horsepower and mileage improvements.

","second_title":"Description","second_text":"

See the full product description above for detailed specifications and compatibility information.

","third_title":"Shipping & Returns","third_text":"

Processing: Orders ship on average within 48 hours, excluding weekends

Shipping: All orders are shipped via FedEx to the US and Canada. Most orders arrive within 4-6 business days.

Returns: Our 30-day return policy offers peace of mind that you will be satisfied with the product. If you are not satisfied, you may return the product for a refund of the original purchase price

","fourth_title":"Specs","fourth_text":"

Specifications vary by product.

","star_style":"mild","stars_count":5,"stars_color":"#46523e","stars_bg_half_color":"#f0de72","reviewer_name":"Will Gober","review_date":"OWNER at - www.PowerCurveXP.com","reviewer_subtext":"ASE-Master Certified Diesel Technician","show_verified_badge":true,"verified_badge_color":"#46523e","reviewer_image":"//dieselmodules.com/cdn/shop/files/Screenshot_419.png?v=1779214923","tab_text_size":13,"tab_font_weight":600,"content_text_size":13,"light_color":"#ffffff","dark_color":"#f0f6eb","tab_text_color":"#46523e","text_color":"#3a4434","muted_text_color":"#6b7a60","effect":"none","border":"solid","border_thickness":1,"border_color":"#c4ccba","radius":8,"padding_vertical":18,"padding_horizontal":18,"custom_css":""}

Country/region

6.6L Duramax L5P (2026) #61720 - 90/225

6.6L Duramax L5P (2026) #61720 - 90/225