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Spec D

Built for your Spec D platform, this collection offers a range of high-quality aftermarket parts and upgrades designed to enhance your vehicle’s performance and reliability. Whether you’re looking to improve power delivery, throttle response, or overall durability, these components are engineered to meet the demands of serious enthusiasts.

Inside this category, you’ll find everything from performance engine parts to supporting upgrades that help optimize your build. Each product is selected with fitment and function in mind, ensuring compatibility and maximum impact on your Spec D setup.

  • Engine internals for strength and reliability
  • Performance upgrades for power and response
  • Supporting mods to enhance overall drivability
  • Durable components built for long-term use

Shop Spec D aftermarket upgrades for your vehicle at FastHemis.

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531 Results

Spec D U-Shape Halo Projector Halo Headlights (Black): Dodge Charger 2011 - 2014
Spec D U-Shape Halo Projector Halo Headlights (Black): Dodge Charger 2011 - 2014

Spec D U-Shape Halo Projector Halo Headlights (Black): Dodge Charger 2011 - 2014

Spec D
5.0 (1)

Regular price $501.00 $371.00 26% off

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Spec D Vertical Grill (Black): Chrysler 300 / 300C 2005 - 2010

Spec D

Regular price $99.00 $73.00 26% off

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Spec D Vertical Grill (Black): Dodge Ram 1994 - 2002
Spec D Vertical Grill (Black): Dodge Ram 1994 - 2002

Spec D Vertical Grill (Black): Dodge Ram 1994 - 2002

Spec D

Regular price $135.00 $100.00 26% off

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Spec D Vertical Grill (Black): Dodge Ram 2006 - 2008
Spec D Vertical Grill (Black): Dodge Ram 2006 - 2008
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Spec D Vertical Grill (Black): Dodge Ram 2006 - 2008

Spec D

Regular price $130.00 $113.00 13% off

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Spec D Vertical Grill (Chrome): Chrysler 300 / 300C 2005 - 2010

Spec D

Regular price $93.00 $69.00 26% off

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Spec D Vertical Grill (Chrome): Dodge Ram 1994 - 2002
Spec D Vertical Grill (Chrome): Dodge Ram 1994 - 2002
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Spec D Vertical Grill (Chrome): Dodge Ram 1994 - 2002

Spec D

Regular price $131.00 $97.00 26% off

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Spec D Vinyl Roll Up Tonneau Cover: Dodge Ram (w/ 6.4ft Bed) 2002 - 2018
Spec D Vinyl Roll Up Tonneau Cover: Dodge Ram (w/ 6.4ft Bed) 2002 - 2018
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Spec D Vinyl Roll Up Tonneau Cover: Dodge Ram (w/ 6.4ft Bed) 2002 - 2018

Spec D

Regular price $292.00 $216.00 26% off

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Spec D Vinyl Roll-Up Tonneau Cover: Dodge Ram (w/ 5.7ft Bed) 2009 - 2018
Spec D Vinyl Roll-Up Tonneau Cover: Dodge Ram (w/ 5.7ft Bed) 2009 - 2018
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Spec D Vinyl Roll-Up Tonneau Cover: Dodge Ram (w/ 5.7ft Bed) 2009 - 2018

Spec D

Regular price $311.00 $230.00 26% off

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Spec D Vinyl Roll-Up Tonneau Cover: Dodge Ram (w/ 6.4ft Bed) 2002 - 2018
Spec D Vinyl Roll-Up Tonneau Cover: Dodge Ram (w/ 6.4ft Bed) 2002 - 2018
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Spec D Vinyl Roll-Up Tonneau Cover: Dodge Ram (w/ 6.4ft Bed) 2002 - 2018

Spec D

Regular price $246.00 $182.00 26% off

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Spec D Vinyl Roll-Up Tonneau Cover: Dodge Ram (w/ 6.5ft Bed) 2002 - 2018
Spec D Vinyl Roll-Up Tonneau Cover: Dodge Ram (w/ 6.5ft Bed) 2002 - 2018
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Spec D Vinyl Roll-Up Tonneau Cover: Dodge Ram (w/ 6.5ft Bed) 2002 - 2018

Spec D

Regular price $239.00 $206.00 14% off

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Spec D Vinyl Roll-Up Tonneau Cover: Ram 1500 (w/ 6.4ft Bed) 2019 - 2024
Spec D Vinyl Roll-Up Tonneau Cover: Ram 1500 (w/ 6.4ft Bed) 2019 - 2024
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Spec D Vinyl Roll-Up Tonneau Cover: Ram 1500 (w/ 6.4ft Bed) 2019 - 2024

Spec D

Regular price $323.00 $236.00 27% off

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Enhance Your Spec D Platform with Performance Engine Internals and Upgrades

Optimizing your Spec D vehicle requires parts that deliver both strength and precision. This collection focuses on high-quality aftermarket components engineered to improve power delivery, throttle response, and overall durability. Whether you’re building for daily reliability or track-ready performance, these upgrades are designed to fit and function seamlessly on your Spec D setup.

Why upgrade your engine internals on a Spec D platform?

Upgrading engine internals is essential for enhancing the strength and reliability of your Spec D vehicle, especially if you’re pushing power limits or running forced induction. Stronger pistons, rods, and other components help your engine withstand increased stress and heat, reducing the risk of failure and extending engine life. These upgrades also improve throttle response and power consistency under demanding conditions.

  • Increase durability for high-performance builds
  • Improve power delivery and throttle response
  • Ensure compatibility with supporting performance mods
  • Maintain long-term reliability during aggressive driving

What supporting modifications should I consider for my Spec D build?

To maximize the benefits of your Spec D engine internals, consider complementary upgrades that enhance overall drivability and performance. Supporting mods like upgraded fuel systems, cooling components, and exhaust improvements help maintain engine health and optimize power output. Proper tuning is also critical to ensure all parts work together efficiently and safely.

How to choose the right Spec D aftermarket parts for your vehicle?

Selecting the right parts for your Spec D platform means focusing on fitment, function, and your specific performance goals. Whether you need engine internals built for strength or performance upgrades that sharpen response, prioritize components designed to integrate smoothly with your existing setup. Shop the full Spec D collection at FastHemis to find parts tailored to your build and driving style.

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