★★★★★ 5
Just as good as OEM
Exactly what I expected...
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 9, 2025
BD Diesel 19-23 Chevrolet Silverado / GMC Sierra 1500 8L90 Cooler Bypass Delete
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
BD Diesel 19-23 Chevrolet Silverado / GMC Sierra 1500 8L90 Cooler Bypass DeleteSKU: 1061531 COOLER BYPASS DELETE CHEVY SILVERADO GMC SIERRA 1500 8L90 1 2" COOLER LINES 2019 2023 FEATURES Eliminates factory bypass valve Ensures 100% fluid flow through the transmission cooler Keeps your transmission temperature as low as possible Includes all new seals required for install, and magnetic service plug ABOUT THIS PRODUCT Debris in the stock cooler bypass valve can cause it to jam the internal valve, keeping it in recirculation mode.
Quick Dispatch:
Your BD Diesel 19-23 Chevrolet Silverado / GMC Sierra 1500 8L90 Cooler Bypass Delete orders ship within 1-2 business days.
Delivery Options:
- Standard: 3-7 business days
- Fast: 2-3 business days
- Express: 1-2 business days
Order Tracking:
You'll receive a tracking link by email once your BD Diesel 19-23 Chevrolet Silverado / GMC Sierra 1500 8L90 Cooler Bypass Delete ships.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
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4.6 ★★★★★
Based on 2159 reviews
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Product Reviews
★★★★★ 5
Fit perfectly
Truly impressive, bought these and a set from a us boat supplier a thermostat made in the USA . They came with the gasket separate . I could not figure out how to put it together . I used these in my mercury optimax 135 hp . They fit perfectly and appear to be working great at a quarter the cost .
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Reviewed in the United States on August 29, 2024
★★★★★ 5
Handles the power
Size: 5FT, Style: 8AWG
Used for leads to handle high Amperage. Replaced cheesy 12 gauge leads that came with
the unit
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Reviewed in the United States on January 28, 2026
★★★★★ 5
Good stuff!
Size: 5FT, Style: 8AWG
Good quality silicone insulated wire. It’s very flexible and solders really well. The silicone insulation can’t be beat for heat resistance. I will definitely purchase again.
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Reviewed in the United States on January 12, 2026
★★★★★ 5
Awesome Wire
Size: 15FT, Style: 8AWG
These work great! I purchased these for my subwoofer and they do a great job! Super flexible! They have no weird smells either! Would buy again!
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Reviewed in the United States on November 7, 2025
