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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 3" Side Step Nerf Bars (Polished, 2pc): Jeep Grand Cherokee 1999 - 2004
Spec D 3" Side Step Nerf Bars (Polished, 2pc): Jeep Grand Cherokee 1999 - 2004
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Spec D 3" Side Step Nerf Bars (Polished, 2pc): Jeep Grand Cherokee 1999 - 2004

Spec D

Regular price $207.00 $153.00 26% off

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Spec D 5" Side Step Nerf Bars (Polished): Dodge Ram Crew Cab 2009 - 2018
Spec D 5" Side Step Nerf Bars (Polished): Dodge Ram Crew Cab 2009 - 2018
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Spec D 5" Side Step Nerf Bars (Polished): Dodge Ram Crew Cab 2009 - 2018

Spec D

Regular price $358.00 $265.00 26% off

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Spec D 5" Side Step Nerf Bars (Polished): Dodge Ram Quad Cab 2009 - 2018
Spec D 5" Side Step Nerf Bars (Polished): Dodge Ram Quad Cab 2009 - 2018
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Spec D 5" Side Step Nerf Bars (Polished): Dodge Ram Quad Cab 2009 - 2018

Spec D

Regular price $358.00 $265.00 26% off

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Spec D 50" Windshield Light Mounting Bracket: Jeep Wrangler JK 2007 - 2018
Spec D 50" Windshield Light Mounting Bracket: Jeep Wrangler JK 2007 - 2018
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Spec D 50" Windshield Light Mounting Bracket: Jeep Wrangler JK 2007 - 2018

Spec D

Regular price $88.00 $65.00 26% off

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Spec D Altezza Tail Lights (Black): Dodge 1994 - 2002

Spec D

Regular price $84.00 $62.00 26% off

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Spec D Altezza Tail Lights (Black): Dodge 1997 - 2004

Spec D

Regular price $122.00 $90.00 26% off

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Spec D Altezza Tail Lights (Black): Dodge Charger 2006 - 2010
Spec D Altezza Tail Lights (Black): Dodge Charger 2006 - 2010

Spec D Altezza Tail Lights (Black): Dodge Charger 2006 - 2010

Spec D

Regular price $172.00 $127.00 26% off

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Spec D Altezza Tail Lights (Black): Dodge Magnum 2005 - 2008

Spec D

Regular price $131.00 $97.00 26% off

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Spec D Altezza Tail Lights (Black): Jeep Grand Cherokee 2005 - 2006
Spec D Altezza Tail Lights (Black): Jeep Grand Cherokee 2005 - 2006

Spec D Altezza Tail Lights (Black): Jeep Grand Cherokee 2005 - 2006

Spec D

Regular price $157.00 $116.00 26% off

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Spec D Altezza Tail Lights (Chrome): Dodge 1997 - 2004

Spec D

Regular price $100.00 $74.00 26% off

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Spec D Altezza Tail Lights (Chrome): Dodge Charger 2006 - 2008
Spec D Altezza Tail Lights (Chrome): Dodge Charger 2006 - 2008
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Spec D Altezza Tail Lights (Chrome): Dodge Charger 2006 - 2008

Spec D

Regular price $125.00 $106.00 15% off

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Spec D Altezza Tail Lights (Chrome): Dodge Ram 1994 - 2002
Spec D Altezza Tail Lights (Chrome): Dodge Ram 1994 - 2002

Spec D Altezza Tail Lights (Chrome): Dodge Ram 1994 - 2002

Spec D

Regular price $85.00 $63.00 26% off

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Spec D Altezza Tail Lights (Chrome): Jeep Grand Cherokee 2005 - 2006
Spec D Altezza Tail Lights (Chrome): Jeep Grand Cherokee 2005 - 2006
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Spec D Altezza Tail Lights (Chrome): Jeep Grand Cherokee 2005 - 2006

Spec D

Regular price $147.00 $109.00 26% off

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Spec D Altezza Tail Lights (Red w/ Black Bottom): Dodge Magnum 2005 - 2008
Spec D Altezza Tail Lights (Red w/ Black Bottom): Dodge Magnum 2005 - 2008
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Spec D Altezza Tail Lights (Red w/ Black Bottom): Dodge Magnum 2005 - 2008

Spec D

Regular price $142.00 $105.00 26% off

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Spec D Altezza Tail Lights (Smoke): Dodge Dakota 1997 - 2004
Spec D Altezza Tail Lights (Smoke): Dodge Dakota 1997 - 2004
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Spec D Altezza Tail Lights (Smoke): Dodge Dakota 1997 - 2004

Spec D

Regular price $109.00 $81.00 26% off

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Spec D Altezza Tail Lights (Smoke): Dodge Ram 1994 - 2002
Spec D Altezza Tail Lights (Smoke): Dodge Ram 1994 - 2002

Spec D Altezza Tail Lights (Smoke): Dodge Ram 1994 - 2002

Spec D

Regular price $84.00 $62.00 26% off

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Spec D Altezza Tail Lights (Smoke): Dodge Ram 2002 - 2006
Spec D Altezza Tail Lights (Smoke): Dodge Ram 2002 - 2006

Spec D Altezza Tail Lights (Smoke): Dodge Ram 2002 - 2006

Spec D

Regular price $95.00 $70.00 26% off

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Spec D Altezza Tail Lights (Smoke): Jeep Grand Cherokee 2005 - 2006
Spec D Altezza Tail Lights (Smoke): Jeep Grand Cherokee 2005 - 2006
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Spec D Altezza Tail Lights (Smoke): Jeep Grand Cherokee 2005 - 2006

Spec D

Regular price $144.00 $107.00 26% off

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Spec D Aluminum Radiator (2-Row): Dodge Ram 5.9L & 6.7L Diesel 2003 - 2009
Spec D Aluminum Radiator (2-Row): Dodge Ram 5.9L & 6.7L Diesel 2003 - 2009

Spec D Aluminum Radiator (2-Row): Dodge Ram 5.9L & 6.7L Diesel 2003 - 2009

Spec D

Regular price $394.00 $292.00 26% off

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Spec D Aluminum Radiator (3-Row): Dodge Ram 5.9L Diesel 1994 - 2002
Spec D Aluminum Radiator (3-Row): Dodge Ram 5.9L Diesel 1994 - 2002

Spec D Aluminum Radiator (3-Row): Dodge Ram 5.9L Diesel 1994 - 2002

Spec D

Regular price $374.00 $277.00 26% off

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Spec D Aluminum Radiator (3-Row): Jeep Wrangler TJ 1997 - 2006
Spec D Aluminum Radiator (3-Row): Jeep Wrangler TJ 1997 - 2006
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Spec D Aluminum Radiator (3-Row): Jeep Wrangler TJ 1997 - 2006

Spec D

Regular price $238.00 $176.00 26% off

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Spec D Aluminum Radiator: Jeep Grand Cherokee 4.0L w/ Automatic Transmission 1999 - 2004
Spec D Aluminum Radiator: Jeep Grand Cherokee 4.0L w/ Automatic Transmission 1999 - 2004

Spec D Aluminum Radiator: Jeep Grand Cherokee 4.0L w/ Automatic Transmission 1999 - 2004

Spec D

Regular price $274.00 $203.00 26% off

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Spec D Billet Grille (Chrome): Dodge Ram 2002 - 2005
Spec D Billet Grille (Chrome): Dodge Ram 2002 - 2005
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Spec D Billet Grille (Chrome): Dodge Ram 2002 - 2005

Spec D

Regular price $131.00 $113.00 14% off

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Spec D Black Mesh Grille: Dodge Ram 1500 2009 - 2012
Spec D Black Mesh Grille: Dodge Ram 1500 2009 - 2012
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Spec D Black Mesh Grille: Dodge Ram 1500 2009 - 2012

Spec D

Regular price $153.00 $113.00 26% off

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

Spec D

Regular price $166.00 $123.00 26% off

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Spec D CCFL Projector Headlights (Black):Dodge Ram 1994 - 2001
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Spec D CCFL Projector Headlights (Black):Dodge Ram 1994 - 2001

Spec D

Regular price $343.00 $254.00 26% off

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Spec D CCFL Projector Headlights (Black):Dodge Ram 2009 - 2014
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Spec D CCFL Projector Headlights (Black):Dodge Ram 2009 - 2014

Spec D

Regular price $678.00 $502.00 26% off

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Spec D CCFL Projector Headlights (Black):Jeep Grand Cherokee 1999 - 2004

Spec D CCFL Projector Headlights (Black):Jeep Grand Cherokee 1999 - 2004

Spec D

Regular price $360.00 $267.00 26% off

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Spec D CCFL Projector Headlights (Chrome):Dodge Charger 2006 - 2010
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Spec D CCFL Projector Headlights (Chrome):Dodge Charger 2006 - 2010

Spec D

Regular price $381.00 $282.00 26% off

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Spec D CCFL Projector Headlights (Chrome):Dodge Ram 1994 - 2001
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Spec D CCFL Projector Headlights (Chrome):Dodge Ram 1994 - 2001

Spec D

Regular price $343.00 $254.00 26% off

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Spec D CCFL Projector Headlights (Chrome):Dodge Ram 2006 - 2008
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Spec D CCFL Projector Headlights (Chrome):Dodge Ram 2006 - 2008

Spec D

Regular price $473.00 $350.00 26% off

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Spec D CCFL Projector Headlights (Chrome):Dodge Ram 2009 - 2014
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Spec D CCFL Projector Headlights (Chrome):Dodge Ram 2009 - 2014

Spec D

Regular price $678.00 $502.00 26% off

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Spec D Chrome Bumper Trim (5pc, Front & Rear): Chrysler 300 2005 - 2010
Spec D Chrome Bumper Trim (5pc, Front & Rear): Chrysler 300 2005 - 2010

Spec D Chrome Bumper Trim (5pc, Front & Rear): Chrysler 300 2005 - 2010

Spec D

Regular price $93.00 $69.00 26% off

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Spec D Chrome Door Handle Covers: Chrysler 300 & Dodge Magnum 2005 - 2010
Spec D Chrome Door Handle Covers: Chrysler 300 & Dodge Magnum 2005 - 2010

Spec D Chrome Door Handle Covers: Chrysler 300 & Dodge Magnum 2005 - 2010

Spec D

Regular price $26.00 $19.00 27% off

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Spec D Chrome Door Pillars: Chrysler 300 & Dodge Magnum 2005 - 2010
Spec D Chrome Door Pillars: Chrysler 300 & Dodge Magnum 2005 - 2010

Spec D Chrome Door Pillars: Chrysler 300 & Dodge Magnum 2005 - 2010

Spec D

Regular price $39.00 $29.00 26% off

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Spec D Chrome Mesh Grille (Riveted Style): Dodge Ram 2006 - 2008
Spec D Chrome Mesh Grille (Riveted Style): Dodge Ram 2006 - 2008

Spec D Chrome Mesh Grille (Riveted Style): Dodge Ram 2006 - 2008

Spec D

Regular price $297.00 $220.00 26% off

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Spec D Chrome Passenger Mirror w/ Turn & Puddle Light (PASS): Fits Dodge / Ram (02-18)
Spec D Chrome Passenger Mirror w/ Turn & Puddle Light (PASS): Fits Dodge / Ram (02-18)
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Spec D Chrome Passenger Mirror w/ Turn & Puddle Light (PASS): Fits Dodge / Ram (02-18)

Spec D

Regular price $173.00 $128.00 26% off

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Spec D Clear Fog Lights Kit (w/ OUT Wiring): Dodge Ram 2002 - 2005
Spec D Clear Fog Lights Kit (w/ OUT Wiring): Dodge Ram 2002 - 2005
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Spec D Clear Fog Lights Kit (w/ OUT Wiring): Dodge Ram 2002 - 2005

Spec D

Regular price $55.00 $41.00 25% off

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Spec D Corner Lights (Black): Dodge Charger 2006 - 2010
Spec D Corner Lights (Black): Dodge Charger 2006 - 2010
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Spec D Corner Lights (Black): Dodge Charger 2006 - 2010

Spec D

Regular price $26.00 $19.00 27% off

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Spec D Corner Lights (Black): Jeep Grand Cherokee 1993 - 1998
Spec D Corner Lights (Black): Jeep Grand Cherokee 1993 - 1998

Spec D Corner Lights (Black): Jeep Grand Cherokee 1993 - 1998

Spec D

Regular price $30.00 $22.00 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.

SELECT YOUR VEHICLE