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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.

SELECT YOUR VEHICLE

531 Results

Spec D Mirrors SET w/ Turn Signal Light & Puddle Light (Auto-Fold, Black): Ram 2013 - 2018
Spec D Mirrors SET w/ Turn Signal Light & Puddle Light (Auto-Fold, Black): Ram 2013 - 2018
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Spec D Mirrors SET w/ Turn Signal Light & Puddle Light (Auto-Fold, Black): Ram 2013 - 2018

Spec D

Regular price $552.00 $409.00 26% off

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Spec D Mirrors SET w/ Turn Signal Light & Puddle Light (Auto-Fold, Chrome): Ram 2013 - 2018
Spec D Mirrors SET w/ Turn Signal Light & Puddle Light (Auto-Fold, Chrome): Ram 2013 - 2018

Spec D Mirrors SET w/ Turn Signal Light & Puddle Light (Auto-Fold, Chrome): Ram 2013 - 2018

Spec D

Regular price $562.00 $416.00 26% off

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Spec D Mirrors SET w/ Turn Signal Light & Puddle Light (Manual-Fold, Black): Dodge Ram 2002 - 2009
Spec D Mirrors SET w/ Turn Signal Light & Puddle Light (Manual-Fold, Black): Dodge Ram 2002 - 2009
Spec D Mud Flaps (Black, 4pc): Dodge Ram (w/ Factory Flares) 2009 - 2018
Spec D Mud Flaps (Black, 4pc): Dodge Ram (w/ Factory Flares) 2009 - 2018
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Spec D Mud Flaps (Black, 4pc): Dodge Ram (w/ Factory Flares) 2009 - 2018

Spec D

Regular price $55.00 $41.00 25% off

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Spec D Mud Flaps (Black, 4pc): Dodge Ram (w/ OUT Factory Flares) 2009 - 2018
Spec D Mud Flaps (Black, 4pc): Dodge Ram (w/ OUT Factory Flares) 2009 - 2018
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Spec D Mud Flaps (Black, 4pc): Dodge Ram (w/ OUT Factory Flares) 2009 - 2018

Spec D

Regular price $36.00 $27.00 25% off

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Spec D OEM Fog Lights (Clear): Dodge Charger 2006 - 2010
Spec D OEM Fog Lights (Clear): Dodge Charger 2006 - 2010
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Spec D OEM Fog Lights (Clear): Dodge Charger 2006 - 2010

Spec D

Regular price $46.00 $34.00 26% off

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Spec D OEM Fog Lights (Clear): Dodge Charger 2011 - 2014
Spec D OEM Fog Lights (Clear): Dodge Charger 2011 - 2014

Spec D OEM Fog Lights (Clear): Dodge Charger 2011 - 2014

Spec D

Regular price $68.00 $50.00 26% off

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Spec D OEM Fog Lights (Smoke): Dodge Charger 2006 - 2010
Spec D OEM Fog Lights (Smoke): Dodge Charger 2006 - 2010
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Spec D OEM Fog Lights (Smoke): Dodge Charger 2006 - 2010

Spec D

Regular price $46.00 $34.00 26% off

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Spec D OEM Quad Style Headlights (Smoke): Dodge Ram 2009 - 2018
Spec D OEM Quad Style Headlights (Smoke): Dodge Ram 2009 - 2018

Spec D OEM Quad Style Headlights (Smoke): Dodge Ram 2009 - 2018

Spec D

Regular price $119.00 $88.00 26% off

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Spec D OEM Style Fender Flares (Black, 4pc): Dodge Ram 2002 - 2009
Spec D OEM Style Fender Flares (Black, 4pc): Dodge Ram 2002 - 2009

Spec D OEM Style Fender Flares (Black, 4pc): Dodge Ram 2002 - 2009

Spec D

Regular price $128.00 $95.00 26% off

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Spec D OEM Style Fender Flares: Ram 1500 2019 - 2024
Spec D OEM Style Fender Flares: Ram 1500 2019 - 2024

Spec D OEM Style Fender Flares: Ram 1500 2019 - 2024

Spec D

Regular price $208.00 $154.00 26% off

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Spec D OEM Style Fog Lights (Black): Ram 2500 & 3500 2019 - 2024
Spec D OEM Style Fog Lights (Black): Ram 2500 & 3500 2019 - 2024

Spec D OEM Style Fog Lights (Black): Ram 2500 & 3500 2019 - 2024

Spec D

Regular price $552.00 $409.00 26% off

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Spec D OEM Style Fog Lights (Clear): Ram 2500 & 3500 2019 - 2024
Spec D OEM Style Fog Lights (Clear): Ram 2500 & 3500 2019 - 2024

Spec D OEM Style Fog Lights (Clear): Ram 2500 & 3500 2019 - 2024

Spec D

Regular price $559.00 $414.00 26% off

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Spec D OEM Style Fog Lights (Smoke): Dodge Ram 2002 - 2009
Spec D OEM Style Fog Lights (Smoke): Dodge Ram 2002 - 2009
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Spec D OEM Style Fog Lights (Smoke): Dodge Ram 2002 - 2009

Spec D

Regular price $51.00 $38.00 25% off

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Spec D OEM Style Fog Lights (Smoke): Ram 2500 & 3500 2019 - 2024
Spec D OEM Style Fog Lights (Smoke): Ram 2500 & 3500 2019 - 2024

Spec D OEM Style Fog Lights (Smoke): Ram 2500 & 3500 2019 - 2024

Spec D

Regular price $587.00 $435.00 26% off

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Spec D OEM Style Fog Lights: Dodge Ram 2002 - 2009
Spec D OEM Style Fog Lights: Dodge Ram 2002 - 2009
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Spec D OEM Style Fog Lights: Dodge Ram 2002 - 2009

Spec D

Regular price $49.00 $36.00 27% off

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Spec D OEM Style Fog Lights: Dodge Ram 2009 - 2018
Spec D OEM Style Fog Lights: Dodge Ram 2009 - 2018
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Spec D OEM Style Fog Lights: Dodge Ram 2009 - 2018

Spec D

Regular price $51.00 $38.00 25% off

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Spec D OEM Style Headlights & Corner Lights (Black): Dodge Ram 1500 Sport 1999 - 2001
Spec D OEM Style Headlights & Corner Lights (Black): Dodge Ram 1500 Sport 1999 - 2001

Spec D OEM Style Headlights & Corner Lights (Black): Dodge Ram 1500 Sport 1999 - 2001

Spec D

Regular price $153.00 $113.00 26% off

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Spec D OEM Style Headlights & Corner Lights (Chrome): Dodge Ram 1500 Sport 1999 - 2001
Spec D OEM Style Headlights & Corner Lights (Chrome): Dodge Ram 1500 Sport 1999 - 2001

Spec D OEM Style Headlights & Corner Lights (Chrome): Dodge Ram 1500 Sport 1999 - 2001

Spec D

Regular price $144.00 $107.00 26% off

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Spec D OEM Style Headlights & Corner Lights (Chrome): Dodge Ram 1998 - 2002
Spec D OEM Style Headlights & Corner Lights (Chrome): Dodge Ram 1998 - 2002

Spec D OEM Style Headlights & Corner Lights (Chrome): Dodge Ram 1998 - 2002

Spec D

Regular price $92.00 $68.00 26% off

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Spec D OEM Style Headlights (Black): Chrysler 300 2005 - 2010
Spec D OEM Style Headlights (Black): Chrysler 300 2005 - 2010

Spec D OEM Style Headlights (Black): Chrysler 300 2005 - 2010

Spec D

Regular price $124.00 $92.00 26% off

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Spec D OEM Style Headlights (Black): Dodge Durango 2004 - 2006
Spec D OEM Style Headlights (Black): Dodge Durango 2004 - 2006

Spec D OEM Style Headlights (Black): Dodge Durango 2004 - 2006

Spec D

Regular price $158.00 $117.00 26% off

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Spec D OEM Style Headlights (Black): Jeep Grand Cherokee 2005 - 2007
Spec D OEM Style Headlights (Black): Jeep Grand Cherokee 2005 - 2007

Spec D OEM Style Headlights (Black): Jeep Grand Cherokee 2005 - 2007

Spec D

Regular price $135.00 $100.00 26% off

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Spec D OEM Style Headlights (Black): Ram 1500 2019 - 2024
Spec D OEM Style Headlights (Black): Ram 1500 2019 - 2024

Spec D OEM Style Headlights (Black): Ram 1500 2019 - 2024

Spec D

Regular price $366.00 $271.00 26% off

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Spec D OEM Style Headlights (Chrome): Chrysler 300 2005 - 2010
Spec D OEM Style Headlights (Chrome): Chrysler 300 2005 - 2010
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Spec D OEM Style Headlights (Chrome): Chrysler 300 2005 - 2010

Spec D

Regular price $126.00 $93.00 26% off

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Spec D OEM Style Headlights (Chrome): Dodge Durango 2004 - 2006
Spec D OEM Style Headlights (Chrome): Dodge Durango 2004 - 2006

Spec D OEM Style Headlights (Chrome): Dodge Durango 2004 - 2006

Spec D

Regular price $173.00 $128.00 26% off

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Spec D OEM Style Headlights (Chrome): Dodge Neon 2003 - 2005
Spec D OEM Style Headlights (Chrome): Dodge Neon 2003 - 2005

Spec D OEM Style Headlights (Chrome): Dodge Neon 2003 - 2005

Spec D

Regular price $119.00 $88.00 26% off

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Spec D OEM Style Headlights (Chrome): Jeep Grand Cherokee 2005 - 2007
Spec D OEM Style Headlights (Chrome): Jeep Grand Cherokee 2005 - 2007

Spec D OEM Style Headlights (Chrome): Jeep Grand Cherokee 2005 - 2007

Spec D

Regular price $158.00 $117.00 26% off

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Spec D OEM Style Headlights (Chrome): Ram 1500 2019 - 2024
Spec D OEM Style Headlights (Chrome): Ram 1500 2019 - 2024

Spec D OEM Style Headlights (Chrome): Ram 1500 2019 - 2024

Spec D

Regular price $383.00 $284.00 26% off

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Spec D OEM Style Headlights (Smoke): Jeep Grand Cherokee 2005 - 2007
Spec D OEM Style Headlights (Smoke): Jeep Grand Cherokee 2005 - 2007
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Spec D OEM Style Headlights (Smoke): Jeep Grand Cherokee 2005 - 2007

Spec D

Regular price $138.00 $102.00 26% off

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Spec D OEM Style Headlights (Smoke): Ram 1500 2019 - 2024
Spec D OEM Style Headlights (Smoke): Ram 1500 2019 - 2024
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Spec D OEM Style Headlights (Smoke): Ram 1500 2019 - 2024

Spec D

Regular price $421.00 $312.00 26% off

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Spec D OEM Style Headlights w/ DRL Light Bar (Black): Ram 2500 & 3500 2019 - 2024

Spec D

Regular price $593.00 $439.00 26% off

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Spec D OEM Style Headlights w/ LED Bar (Black): Dodge Ram 1994 - 2002
Spec D OEM Style Headlights w/ LED Bar (Black): Dodge Ram 1994 - 2002
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Spec D OEM Style Headlights w/ LED Bar (Black): Dodge Ram 1994 - 2002

Spec D

Regular price $257.00 $190.00 26% off

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Spec D OEM Style Headlights w/ LED Bar (Black): Dodge Ram 2006 - 2008
Spec D OEM Style Headlights w/ LED Bar (Black): Dodge Ram 2006 - 2008

Spec D OEM Style Headlights w/ LED Bar (Black): Dodge Ram 2006 - 2008

Spec D

Regular price $254.00 $188.00 26% 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.

SELECT YOUR VEHICLE