--- product_id: 569805968 title: "Superior 6L80 6L90 8L90 Sure Cool System Upgrade STL010" brand: "wit whatever it takes transmission parts, inc" price: "$127.72" currency: USD in_stock: true reviews_count: 5 category: "Wit Whatever It Takes Transmission Parts, Inc" url: https://www.desertcart.us/products/569805968-superior-6l80-6l90-8l90-sure-cool-system-upgrade-stl010 store_origin: US region: United States of America --- # Immediate fluid level check 20% cooler operation Built-in safety bypass Superior 6L80 6L90 8L90 Sure Cool System Upgrade STL010 **Brand:** wit whatever it takes transmission parts, inc **Price:** $127.72 **Availability:** ✅ In Stock ## Summary > ❄️ Keep your ride cool, calm, and unstoppable with Sure Cool tech! ## Quick Answers - **What is this?** Superior 6L80 6L90 8L90 Sure Cool System Upgrade STL010 by wit whatever it takes transmission parts, inc - **How much does it cost?** $127.72 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/569805968-superior-6l80-6l90-8l90-sure-cool-system-upgrade-stl010) ## Best For - wit whatever it takes transmission parts, inc enthusiasts ## Why This Product - Trusted wit whatever it takes transmission parts, inc brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Plug & Play Upgrade:** No assembly required—fits all 2014+ 6L80/90E and 2016+ 8L80/90E models for seamless installation. - • **Safety First, Always:** Built-in bypass valve prevents overheating, extending your ATF’s lifespan and your peace of mind. - • **Trusted by Thousands:** Rated 4.8 stars by over 1,300 pros who refuse to settle for less. - • **Instant Fluid Accuracy:** Check fluid levels immediately without waiting for warm-up cycles—precision meets convenience. - • **Stay Sure-Cool Under Pressure:** Reduces operating temps by up to 20%, keeping your transmission chill even under heavy load. ## Overview The WIT WHATEVER IT TAKES Superior 6L80/90 & 8L90 Sure Cool System Upgrade (STL010) is a precision-engineered cooler flow bypass valve kit designed for 2014+ 6L80/90E and 2016+ 8L80/90E transmissions. It delivers immediate fluid level accuracy without warm-up, reduces operating temperatures by up to 20%, and features a built-in safety bypass to prevent overheating—extending transmission fluid life and enhancing reliability. With no assembly required and a stellar 4.8-star rating from over 1,300 users, it’s the must-have upgrade for professionals who demand peak performance and durability. ## Description Fits all 2014-up 6L80/90E AND NOW FITS 8L80/90E 2016-upSuperior’s Cooler Flow bypass valve kit with TransLab’s patented and patent pending Flow~Control cooler bypass technologies allows full time cooler flow and lube to parts “so you’re not hot under the collar”…you’re SURE~COOL ## Features - Built in safety bypass Immediate cooler fill. - Immediate accurate fluid level check without warm-up cycle - Reduced average operating temperatures by as much as 20% - Reduced risk of overheat while under load, Increased ATF life. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0BCL9M23T | | Assembly Required | No | | Brand | WIT WHATEVER IT TAKES TRANSMISSION PARTS, INC | | Customer Reviews | 4.8 4.8 out of 5 stars (1,363) | | Date First Available | 9 September 2022 | | Generic Name | Cooler Flow Bypass Valve Kit | | Item Dimensions LxWxH | 10.2 x 10.2 x 2.5 Centimeters | | Item Weight | 110 g | | Item model number | STL010 | | Manufacturer | Superior | | Manufacturer Part Number | STL010 | | Model | COOLER FLOW BYPASS | | Product Dimensions | 10.16 x 10.16 x 2.54 cm; 110 g | ## Images ![Superior 6L80 6L90 8L90 Sure Cool System Upgrade STL010 - Image 1](https://m.media-amazon.com/images/I/61C9sS0UHhL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by M***D on 29 July 2024* ### ⭐⭐⭐⭐⭐ Review *by J***R on 30 October 2025* ### ⭐⭐⭐⭐⭐ Review *by K***T on 3 March 2026* ## Frequently Bought Together - WIT WHATEVER IT TAKES TRANSMISSION PARTS, INC 6L80 6L90 8L90 Sure Cool System Upgrade STL010 - atp automotive B-239 Automatic Transmission Filter Kit for GM Optional 6L80 Heavy-Duty 6-Speed Transmission - ACDelco GM Original Equipment 10-9395 Dexron VI Automatic Transmission Fluid - 1 gal --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/569805968-superior-6l80-6l90-8l90-sure-cool-system-upgrade-stl010](https://www.desertcart.us/products/569805968-superior-6l80-6l90-8l90-sure-cool-system-upgrade-stl010) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-05-23*