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Air and Fuel› Superchargers, Turbochargers and Components

Hellion

Twin Turbo System

$8,495.00 $7,444.75 Save $1,050.25

SKU: HT-9904GT-TT

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Special Order
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$100 Minimum Order
30 Days Return
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Overview

The Hellion Power Systems Hellraiser is a twin-turbo system designed for the 1999-2004 Ford Mustang GT and Cobra.

This system is unique in its engineering to work with or without a Roots-style supercharger, allowing for a compound boost setup. It is described as the most powerful and versatile system available, capable of higher boost, average power, and low-end torque compared to other systems.
Show original supplier description
The Hellion "Hellraiser" Twin Turbo System (HT-9904GT-TT) is engineered to deliver exceptional power and versatility for the 1999-2004 Ford Mustang GT and Cobra models. This system stands out as a "compound boost" setup when retained with a Roots-style supercharger, a pioneering approach in the Mustang aftermarket. Installation of this system is designed around the UPR tubular K-member, which includes caster camber plates, A-arms, and coil-overs. Using a K-member from another manufacturer may complicate installation and alter the system's intended design. Please note that this product is not legal for sale, installation, or use on a licensed vehicle in California and does not meet CARB compliance. It is intended solely for racing vehicles that will not be used on public highways.

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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Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

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Specifications

BrandHellion
Part NumberHT-9904GT-TT
CategoryAir and Fuel
5,000+ Trusted brands
1M+ Enthusiasts
5M+ Parts sold
(760) 282-4645 hello@motormia.co

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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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