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Drivetrain› Automatic Transmissions and Components

ATS Diesel Performance

Allison Billet Flexplate

$804.99 $724.74 Save $80.25

SKU: 305-900-4248

In Stock
In Stock
Ships by Sep 12
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The ATS Diesel 305-900-4248 Allison Billet Flexplate is an SFI-approved flexplate designed for extreme conditions. Crafted from strong billet steel, it allows for faster and harder transmission shifts without the risk of breaking. It is compatible with stock and aftermarket converters and is sold as a kit.
Show original supplier description
The ATS Diesel 305-900-4248 Allison Billet Flexplate is engineered to withstand the most extreme conditions, meeting SFI race application standards. Constructed from robust billet steel, this flexplate enables quicker and harder transmission shifts, mitigating the risk of breakage often associated with stock components under high-stress situations. It effectively transfers the power of high-horsepower trucks to the wheels by providing the necessary strength to overcome factory limitations. This flexplate is SFI 29.3 approved, ensuring it meets stringent safety and performance benchmarks for demanding race applications. The billet steel construction ensures durability and reliability, solving common breakage issues found in OEM flexplates. Key details include its SFI 29.3 rating, billet steel material, and compatibility with stock and aftermarket converters. It is sold as a kit and is specifically designed for 2001-2005 GM Truck 2500/3500 models equipped with the 6.6L Duramax Diesel engine and an Allison LCT-1000, LCT-2000, or LCT-2400 transmission.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandATS Diesel Performance
Part Number305-900-4248
CategoryDrivetrain

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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