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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 Riveted Style Fender Flares (Smooth Black, 4pc): Dodge Ram 2500 / 3500 2010 - 2018
Spec D Riveted Style Fender Flares (Smooth Black, 4pc): Dodge Ram 2500 / 3500 2010 - 2018
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Spec D Riveted Style Fender Flares (Smooth Black, 4pc): Dodge Ram 2500 / 3500 2010 - 2018

Spec D

Regular price $192.00 $142.00 26% off

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Spec D Riveted Style Fender Flares (Smooth Black, 4pc): Ram 2500 & 3500 2019 - 2024
Spec D Riveted Style Fender Flares (Smooth Black, 4pc): Ram 2500 & 3500 2019 - 2024

Spec D Riveted Style Fender Flares (Smooth Black, 4pc): Ram 2500 & 3500 2019 - 2024

Spec D

Regular price $246.00 $182.00 26% off

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Spec D Riveted Style Fender Flares (Texture Black, 4pc): Dodge Ram 1500 2009 - 2018
Spec D Riveted Style Fender Flares (Texture Black, 4pc): Dodge Ram 1500 2009 - 2018

Spec D Riveted Style Fender Flares (Texture Black, 4pc): Dodge Ram 1500 2009 - 2018

Spec D

Regular price $207.00 $153.00 26% off

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Spec D Riveted Style Fender Flares (Texture Black, 4pc): Ram 1500 2019 - 2024
Spec D Riveted Style Fender Flares (Texture Black, 4pc): Ram 1500 2019 - 2024
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Spec D Riveted Style Fender Flares (Texture Black, 4pc): Ram 1500 2019 - 2024

Spec D

Regular price $370.00 $274.00 26% off

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Spec D Riveted Style Fender Flares (Texture Black, 4pc): Ram 2500 & 3500 2019 - 2024
Spec D Riveted Style Fender Flares (Texture Black, 4pc): Ram 2500 & 3500 2019 - 2024

Spec D Riveted Style Fender Flares (Texture Black, 4pc): Ram 2500 & 3500 2019 - 2024

Spec D

Regular price $230.00 $170.00 26% off

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Spec D Riveted Style Fender Flares (Textured Black, 4pc): Dodge Ram 1994 - 2002
Spec D Riveted Style Fender Flares (Textured Black, 4pc): Dodge Ram 1994 - 2002
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Spec D Riveted Style Fender Flares (Textured Black, 4pc): Dodge Ram 1994 - 2002

Spec D

Regular price $201.00 $149.00 26% off

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

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

Spec D

Regular price $176.00 $130.00 26% off

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Spec D Riveted Style Fender Flares (Textured Black, 4pc): Dodge Ram 2500 & 3500 2010 - 2018
Spec D Riveted Style Fender Flares (Textured Black, 4pc): Dodge Ram 2500 & 3500 2010 - 2018
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Spec D Riveted Style Fender Flares (Textured Black, 4pc): Dodge Ram 2500 & 3500 2010 - 2018

Spec D

Regular price $217.00 $161.00 26% off

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Spec D Roof Rack Bars (Black): Jeep Grand Cherokee 2011 - 2018
Spec D Roof Rack Bars (Black): Jeep Grand Cherokee 2011 - 2018
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Spec D Roof Rack Bars (Black): Jeep Grand Cherokee 2011 - 2018

Spec D

Regular price $82.00 $61.00 26% off

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Spec D Roof Rack Basket (Matte Black): Jeep Gladiator 2020 - 2025
Spec D Roof Rack Basket (Matte Black): Jeep Gladiator 2020 - 2025

Spec D Roof Rack Basket (Matte Black): Jeep Gladiator 2020 - 2025

Spec D

Regular price $547.00 $405.00 26% off

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Spec D Sequential LED Headlights (Chrome): Dodge Charger 2006 - 2010
Spec D Sequential LED Headlights (Chrome): Dodge Charger 2006 - 2010

Spec D Sequential LED Headlights (Chrome): Dodge Charger 2006 - 2010

Spec D

Regular price $261.00 $193.00 26% off

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Spec D Sequential LED Headlights (Smoke): Dodge Charger 2006 - 2010
Spec D Sequential LED Headlights (Smoke): Dodge Charger 2006 - 2010

Spec D Sequential LED Headlights (Smoke): Dodge Charger 2006 - 2010

Spec D

Regular price $292.00 $216.00 26% off

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Spec D Sequential LED Projector Headlights (Black): Dodge Charger 2015 - 2023
Spec D Sequential LED Projector Headlights (Black): Dodge Charger 2015 - 2023

Spec D Sequential LED Projector Headlights (Black): Dodge Charger 2015 - 2023

Spec D

Regular price $585.00 $433.00 26% off

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Spec D Sequential LED Projector Headlights (Chrome): Dodge Charger 2015 - 2023
Spec D Sequential LED Projector Headlights (Chrome): Dodge Charger 2015 - 2023
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Spec D Sequential LED Projector Headlights (Chrome): Dodge Charger 2015 - 2023

Spec D

Regular price $559.00 $414.00 26% off

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Spec D Sequential LED Projector Headlights (Matte Black): Dodge Charger 2015 - 2023
Spec D Sequential LED Projector Headlights (Matte Black): Dodge Charger 2015 - 2023

Spec D Sequential LED Projector Headlights (Matte Black): Dodge Charger 2015 - 2023

Spec D

Regular price $559.00 $414.00 26% off

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Spec D Side Marker Lights (Amber): Jeep 1997 - 2006

Spec D

Regular price $20.00 $15.00 25% off

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Spec D Side Marker Lights (Amber): Jeep Wrangler TJ 1997 - 2006
Spec D Side Marker Lights (Amber): Jeep Wrangler TJ 1997 - 2006

Spec D Side Marker Lights (Amber): Jeep Wrangler TJ 1997 - 2006

Spec D

Regular price $20.00 $15.00 25% off

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Spec D Side Mirror (Square, Quick Release): Jeep Wrangler 1997 - 2018
Spec D Side Mirror (Square, Quick Release): Jeep Wrangler 1997 - 2018
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Spec D Side Mirror (Square, Quick Release): Jeep Wrangler 1997 - 2018

Spec D

Regular price $49.00 $36.00 27% off

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Spec D Side Mirror Covers (Chrome): Chrysler 300 / 300C (05-10),
Spec D Side Mirror Covers (Chrome): Chrysler 300 / 300C (05-10),

Spec D Side Mirror Covers (Chrome): Chrysler 300 / 300C (05-10),

Spec D

Regular price $31.00 $25.00 19% off

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Spec D Side Mirrors (Round, Quick Release): Jeep Wrangler 1997 - 2018
Spec D Side Mirrors (Round, Quick Release): Jeep Wrangler 1997 - 2018

Spec D Side Mirrors (Round, Quick Release): Jeep Wrangler 1997 - 2018

Spec D

Regular price $46.00 $34.00 26% off

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Spec D Side Step Nerf Bars (Black): Jeep Wrangler JK 2-Door 2007 - 2018
Spec D Side Step Nerf Bars (Black): Jeep Wrangler JK 2-Door 2007 - 2018
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Spec D Side Step Nerf Bars (Black): Jeep Wrangler JK 2-Door 2007 - 2018

Spec D

Regular price $197.00 $146.00 26% off

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Spec D Side Step Nerf Bars (Black): Jeep Wrangler JK 4-Door 2007 - 2018
Spec D Side Step Nerf Bars (Black): Jeep Wrangler JK 4-Door 2007 - 2018
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Spec D Side Step Nerf Bars (Black): Jeep Wrangler JK 4-Door 2007 - 2018

Spec D

Regular price $240.00 $178.00 26% off

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Spec D Soft Quad Fold Tonneau Cover: Dodge Dakota (w/ 6.5ft Bed) 2005 - 2011
Spec D Soft Quad Fold Tonneau Cover: Dodge Dakota (w/ 6.5ft Bed) 2005 - 2011
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Spec D Soft Quad Fold Tonneau Cover: Dodge Dakota (w/ 6.5ft Bed) 2005 - 2011

Spec D

Regular price $243.00 $180.00 26% off

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Spec D Soft Quad Fold Tonneau Cover: Dodge Ram (w/ 5.8ft Bed) 2009 - 2018
Spec D Soft Quad Fold Tonneau Cover: Dodge Ram (w/ 5.8ft Bed) 2009 - 2018
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Spec D Soft Quad Fold Tonneau Cover: Dodge Ram (w/ 5.8ft Bed) 2009 - 2018

Spec D

Regular price $250.00 $185.00 26% off

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Spec D Soft Quad Fold Tonneau Cover: Dodge Ram (w/ 6.5ft Bed) 1994 - 2002
Spec D Soft Quad Fold Tonneau Cover: Dodge Ram (w/ 6.5ft Bed) 1994 - 2002
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Spec D Soft Quad Fold Tonneau Cover: Dodge Ram (w/ 6.5ft Bed) 1994 - 2002

Spec D
5.0 (1)

Regular price $244.00 $181.00 26% off

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Spec D Soft Quad-Fold Tonneau Cover: Dodge Ram (w/ 6.4ft Bed) 2002 - 2018
Spec D Soft Quad-Fold Tonneau Cover: Dodge Ram (w/ 6.4ft Bed) 2002 - 2018
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Spec D Soft Quad-Fold Tonneau Cover: Dodge Ram (w/ 6.4ft Bed) 2002 - 2018

Spec D

Regular price $259.00 $192.00 26% off

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Spec D Soft Roll-Up Tonneau Cover: Dodge Ram 1500 (w/ 5.7ft Bed) 2009 - 2018
Spec D Soft Roll-Up Tonneau Cover: Dodge Ram 1500 (w/ 5.7ft Bed) 2009 - 2018

Spec D Soft Roll-Up Tonneau Cover: Dodge Ram 1500 (w/ 5.7ft Bed) 2009 - 2018

Spec D

Regular price $228.00 $169.00 26% off

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Spec D SRT Style Front Lip (Gloss Black, 3pc): Dodge Charger SRT8 2012 - 2014
Spec D SRT Style Front Lip (Gloss Black, 3pc): Dodge Charger SRT8 2012 - 2014

Spec D SRT Style Front Lip (Gloss Black, 3pc): Dodge Charger SRT8 2012 - 2014

Spec D

Regular price $128.00 $95.00 26% off

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Spec D SRT Style Front Lip (Matte Black, 3pc): Dodge Charger SRT8 2012 - 2014
Spec D SRT Style Front Lip (Matte Black, 3pc): Dodge Charger SRT8 2012 - 2014
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Spec D SRT Style Front Lip (Matte Black, 3pc): Dodge Charger SRT8 2012 - 2014

Spec D

Regular price $113.00 $84.00 26% off

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Spec D Stainless Steel Black Mesh Grille: Dodge Ram 2006 - 2008
Spec D Stainless Steel Black Mesh Grille: Dodge Ram 2006 - 2008
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Spec D Stainless Steel Black Mesh Grille: Dodge Ram 2006 - 2008

Spec D

Regular price $219.00 $162.00 26% off

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Spec D Stainless Steel Grille Insert (Black Mesh): Ram 1500 2013 - 2018
Spec D Stainless Steel Grille Insert (Black Mesh): Ram 1500 2013 - 2018
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Spec D Stainless Steel Grille Insert (Black Mesh): Ram 1500 2013 - 2018

Spec D

Regular price $338.00 $250.00 26% off

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Spec D Stainless Steel Grille Insert (Rivet Style, Black Mesh): Dodge Ram 2002 - 2005
Spec D Stainless Steel Grille Insert (Rivet Style, Black Mesh): Dodge Ram 2002 - 2005

Spec D Stainless Steel Grille Insert (Rivet Style, Black Mesh): Dodge Ram 2002 - 2005

Spec D

Regular price $194.00 $144.00 26% off

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Spec D Stainless Steel Grille Insert (Rivet Style, Black Mesh): Ram 1500 2013 - 2018
Spec D Stainless Steel Grille Insert (Rivet Style, Black Mesh): Ram 1500 2013 - 2018
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Spec D Stainless Steel Grille Insert (Rivet Style, Black Mesh): Ram 1500 2013 - 2018

Spec D

Regular price $201.00 $149.00 26% off

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Spec D Tailgate Cap Cover (Black): Dodge Ram 2002 - 2009
Spec D Tailgate Cap Cover (Black): Dodge Ram 2002 - 2009

Spec D Tailgate Cap Cover (Black): Dodge Ram 2002 - 2009

Spec D

Regular price $105.00 $78.00 26% off

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Spec D Tailgate Cap Cover (Black): Dodge Ram 2006 - 2009
Spec D Tailgate Cap Cover (Black): Dodge Ram 2006 - 2009

Spec D Tailgate Cap Cover (Black): Dodge Ram 2006 - 2009

Spec D

Regular price $108.00 $80.00 26% off

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Spec D Tailgate Cap Cover (Black): Dodge Ram 2009 - 2018
Spec D Tailgate Cap Cover (Black): Dodge Ram 2009 - 2018
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Spec D Tailgate Cap Cover (Black): Dodge Ram 2009 - 2018

Spec D

Regular price $85.00 $63.00 26% off

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Spec D Towing Mirrors (Manual): Dodge Ram 1994 - 2002
Spec D Towing Mirrors (Manual): Dodge Ram 1994 - 2002
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Spec D Towing Mirrors (Manual): Dodge Ram 1994 - 2002

Spec D

Regular price $131.00 $97.00 26% off

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Spec D Towing Mirrors (Power): Dodge Ram 1994 - 1997
Spec D Towing Mirrors (Power): Dodge Ram 1994 - 1997
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Spec D Towing Mirrors (Power): Dodge Ram 1994 - 1997

Spec D

Regular price $204.00 $151.00 26% off

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Spec D Towing Mirrors (Power, Heated): Dodge Ram 1998 - 2002
Spec D Towing Mirrors (Power, Heated): Dodge Ram 1998 - 2002

Spec D Towing Mirrors (Power, Heated): Dodge Ram 1998 - 2002

Spec D

Regular price $220.00 $163.00 26% off

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Spec D Tuning OE Style "Clear" Fog Lights: Chrysler 300C 2005-2010
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Spec D Tuning OE Style "Clear" Fog Lights: Chrysler 300C 2005-2010

Spec D

Regular price $131.69 $109.95 17% 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