USE COUPON CODE "SUMMER26"

Your cart

Your cart is empty

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 Factory Style Fender Flares (Smooth Black, 4pc): Dodge Ram (w/ 6.5ft bed) 2002 - 2009
Spec D Factory Style Fender Flares (Smooth Black, 4pc): Dodge Ram (w/ 6.5ft bed) 2002 - 2009

Spec D Factory Style Fender Flares (Smooth Black, 4pc): Dodge Ram (w/ 6.5ft bed) 2002 - 2009

Spec D

Regular price $116.00 $86.00 26% off

Unit price
per 

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

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

Spec D

Regular price $146.00 $108.00 26% off

Unit price
per 

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

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

Spec D

Regular price $136.00 $101.00 26% off

Unit price
per 

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

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

Spec D

Regular price $124.00 $92.00 26% off

Unit price
per 

Spec D Flat Front Fender Flares w/ Switchback LED's (2pc): Jeep Gladiator 2020 - 2025
Spec D Flat Front Fender Flares w/ Switchback LED's (2pc): Jeep Gladiator 2020 - 2025
Sold out

Spec D Flat Front Fender Flares w/ Switchback LED's (2pc): Jeep Gladiator 2020 - 2025

Spec D

Regular price $521.00 $386.00 26% off

Unit price
per 

Spec D Flat Rear Fender Flares (2pc): Jeep Gladiator 2020 - 2025
Spec D Flat Rear Fender Flares (2pc): Jeep Gladiator 2020 - 2025
Sold out

Spec D Flat Rear Fender Flares (2pc): Jeep Gladiator 2020 - 2025

Spec D

Regular price $521.00 $386.00 26% off

Unit price
per 

Spec D Flat Steel Fender Flares (Textured Black, 4pc): Jeep Wrangler JK 2007 - 2018
Spec D Flat Steel Fender Flares (Textured Black, 4pc): Jeep Wrangler JK 2007 - 2018
Sold out

Spec D Flat Steel Fender Flares (Textured Black, 4pc): Jeep Wrangler JK 2007 - 2018

Spec D

Regular price $190.00 $170.00 11% off

Unit price
per 

Spec D Fog Lights (Clear): Dodge Charger 2005 - 2010
Sold out

Spec D Fog Lights (Clear): Dodge Charger 2005 - 2010

Spec D

Regular price $150.00 $115.00 23% off

Unit price
per 

Spec D Fog Lights (Clear): Dodge Ram 1500 Sport 1999 - 2001
Spec D Fog Lights (Clear): Dodge Ram 1500 Sport 1999 - 2001

Spec D Fog Lights (Clear): Dodge Ram 1500 Sport 1999 - 2001

Spec D

Regular price $51.00 $38.00 25% off

Unit price
per 

Spec D Fog Lights (Clear): Dodge Ram 1994 - 2001
Sold out

Spec D Fog Lights (Clear): Dodge Ram 1994 - 2001

Spec D

Regular price $150.00 $115.00 23% off

Unit price
per 

Spec D Fog Lights (Clear): Dodge Ram 1994 - 2002
Spec D Fog Lights (Clear): Dodge Ram 1994 - 2002
Sold out

Spec D Fog Lights (Clear): Dodge Ram 1994 - 2002

Spec D

Regular price $38.00 $28.00 26% off

Unit price
per 

Spec D Fog Lights (Clear): Dodge Ram 2002 - 2008

Spec D Fog Lights (Clear): Dodge Ram 2002 - 2008

Spec D

Regular price $150.00 $115.00 23% off

Unit price
per 

Spec D Fog Lights (Clear): Grand Cherokee / Dakota / Durango 2005 - 2008

Spec D Fog Lights (Clear): Grand Cherokee / Dakota / Durango 2005 - 2008

Spec D

Regular price $150.00 $115.00 23% off

Unit price
per 

Spec D Fog Lights (Smoke): Dodge Charger 2005 - 2010

Spec D Fog Lights (Smoke): Dodge Charger 2005 - 2010

Spec D

Regular price $150.00 $115.00 23% off

Unit price
per 

Spec D Fog Lights (Smoke): Dodge Ram 1994 - 2001
Sold out

Spec D Fog Lights (Smoke): Dodge Ram 1994 - 2001

Spec D

Regular price $150.00 $115.00 23% off

Unit price
per 

Spec D Fog Lights (Smoke): Dodge Ram 1994 - 2002
Spec D Fog Lights (Smoke): Dodge Ram 1994 - 2002
Sold out

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

Spec D

Regular price $43.00 $32.00 26% off

Unit price
per 

Spec D Fog Lights (Smoke): Dodge Ram 2002 - 2005
Spec D Fog Lights (Smoke): Dodge Ram 2002 - 2005

Spec D Fog Lights (Smoke): Dodge Ram 2002 - 2005

Spec D

Regular price $77.00 $57.00 26% off

Unit price
per 

Spec D Fog Lights (Smoke): Dodge Ram 2002 - 2008

Spec D Fog Lights (Smoke): Dodge Ram 2002 - 2008

Spec D

Regular price $150.00 $115.00 23% off

Unit price
per 

Spec D Fog Lights (Smoke): Grand Cherokee / Dakota / Durango 2005 - 2008

Spec D Fog Lights (Smoke): Grand Cherokee / Dakota / Durango 2005 - 2008

Spec D

Regular price $150.00 $115.00 23% off

Unit price
per 

Spec D Fog Lights w/ Bracket (Smoke): Dodge Ram 2002 - 2009
Spec D Fog Lights w/ Bracket (Smoke): Dodge Ram 2002 - 2009
Sold out

Spec D Fog Lights w/ Bracket (Smoke): Dodge Ram 2002 - 2009

Spec D

Regular price $51.00 $38.00 25% off

Unit price
per 

Spec D Fog Lights w/ Switch (Chrome): Ram 1500 2013 - 2018
Spec D Fog Lights w/ Switch (Chrome): Ram 1500 2013 - 2018
Sold out

Spec D Fog Lights w/ Switch (Chrome): Ram 1500 2013 - 2018

Spec D

Regular price $73.00 $54.00 26% off

Unit price
per 

Spec D Fog Lights w/ Switch (Smoke): Ram 1500 2013 - 2018
Spec D Fog Lights w/ Switch (Smoke): Ram 1500 2013 - 2018
Sold out

Spec D Fog Lights w/ Switch (Smoke): Ram 1500 2013 - 2018

Spec D

Regular price $73.00 $54.00 26% off

Unit price
per 

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

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

Spec D

Regular price $68.00 $50.00 26% off

Unit price
per 

Spec D Fog Lights w/ Wiring (Smoke): Dodge Ram 2002 - 2005
Spec D Fog Lights w/ Wiring (Smoke): Dodge Ram 2002 - 2005

Spec D Fog Lights w/ Wiring (Smoke): Dodge Ram 2002 - 2005

Spec D

Regular price $82.00 $61.00 26% off

Unit price
per 

Spec D Fog Lights With Metal Bracket (Clear Lens): Dodge Ram 2009 - 2018
Spec D Fog Lights With Metal Bracket (Clear Lens): Dodge Ram 2009 - 2018
Sold out

Spec D Fog Lights With Metal Bracket (Clear Lens): Dodge Ram 2009 - 2018

Spec D

Regular price $68.00 $50.00 26% off

Unit price
per 

Spec D Fog Lights With Metal Bracket (Smoke Lens): Dodge Ram 2009 - 2018
Spec D Fog Lights With Metal Bracket (Smoke Lens): Dodge Ram 2009 - 2018
Sold out

Spec D Fog Lights With Metal Bracket (Smoke Lens): Dodge Ram 2009 - 2018

Spec D

Regular price $68.00 $50.00 26% off

Unit price
per 

Spec D Front Bumper Lip (Glossy Black): Dodge Challenger SXT 2015 - 2021
Spec D Front Bumper Lip (Glossy Black): Dodge Challenger SXT 2015 - 2021
Sold out

Spec D Front Bumper Lip (Glossy Black): Dodge Challenger SXT 2015 - 2021

Spec D

Regular price $105.00 $78.00 26% off

Unit price
per 

Spec D Front Bumper Lip (Matte Black): Dodge Challenger SXT 2015 - 2021
Spec D Front Bumper Lip (Matte Black): Dodge Challenger SXT 2015 - 2021
Sold out

Spec D Front Bumper Lip (Matte Black): Dodge Challenger SXT 2015 - 2021

Spec D

Regular price $116.00 $86.00 26% off

Unit price
per 

Spec D Front Bumper Splitters (Yellow, 2PC): Dodge Charger SRT & ScatPack 2015 - 2023
Spec D Front Bumper Splitters (Yellow, 2PC): Dodge Charger SRT & ScatPack 2015 - 2023
Sold out

Spec D Front Bumper Splitters (Yellow, 2PC): Dodge Charger SRT & ScatPack 2015 - 2023

Spec D

Regular price $38.00 $28.00 26% off

Unit price
per 

Spec D Front Lip (Glossy Black, 3pc): Dodge Charger 2011 - 2014
Spec D Front Lip (Glossy Black, 3pc): Dodge Charger 2011 - 2014
Sold out

Spec D Front Lip (Glossy Black, 3pc): Dodge Charger 2011 - 2014

Spec D

Regular price $134.00 $99.00 26% off

Unit price
per 

Spec D Front Lip (Matte Black, 3pc): Dodge Charger 2011 - 2014
Spec D Front Lip (Matte Black, 3pc): Dodge Charger 2011 - 2014

Spec D Front Lip (Matte Black, 3pc): Dodge Charger 2011 - 2014

Spec D

Regular price $104.00 $77.00 26% off

Unit price
per 

Spec D Hard Quad Fold Tonneau Cover: Dodge Dakota (w/ 6.5ft Bed) 1997 - 2004
Spec D Hard Quad Fold Tonneau Cover: Dodge Dakota (w/ 6.5ft Bed) 1997 - 2004
Sold out

Spec D Hard Quad Fold Tonneau Cover: Dodge Dakota (w/ 6.5ft Bed) 1997 - 2004

Spec D

Regular price $765.00 $567.00 26% off

Unit price
per 

Spec D Hard Quad-Fold Tonneau Cover: Dodge Ram (w/ 5'8ft Bed) 2009 - 2018
Spec D Hard Quad-Fold Tonneau Cover: Dodge Ram (w/ 5'8ft Bed) 2009 - 2018
Sold out

Spec D Hard Quad-Fold Tonneau Cover: Dodge Ram (w/ 5'8ft Bed) 2009 - 2018

Spec D

Regular price $761.00 $564.00 26% off

Unit price
per 

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

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

Spec D

Regular price $765.00 $567.00 26% off

Unit price
per 

Spec D Headlight Covers: Chrysler 300C 2005 - 2010
Spec D Headlight Covers: Chrysler 300C 2005 - 2010

Spec D Headlight Covers: Chrysler 300C 2005 - 2010

Spec D

Regular price $32.00 $24.00 25% off

Unit price
per 

Spec D Headlights & Corner Lights Combo (Smoke): Dodge Charger 2006 - 2010

Spec D

Regular price $135.00 $100.00 26% off

Unit price
per 

Spec D Heated Manual-Fold Mirror Set w/ Signal & Puddle Light (F&R): Dodge Ram (02-09)
Spec D Heated Manual-Fold Mirror Set w/ Signal & Puddle Light (F&R): Dodge Ram (02-09)
Sold out

Spec D Heated Manual-Fold Mirror Set w/ Signal & Puddle Light (F&R): Dodge Ram (02-09)

Spec D

Regular price $231.00 $171.00 26% off

Unit price
per 

Spec D Heavy-Duty Steel Front Bumper w/ LED's: Dodge Ram 2500 / 3500 2010 - 2018
Spec D Heavy-Duty Steel Front Bumper w/ LED's: Dodge Ram 2500 / 3500 2010 - 2018

Spec D Heavy-Duty Steel Front Bumper w/ LED's: Dodge Ram 2500 / 3500 2010 - 2018

Spec D

Regular price $821.00 $608.00 26% off

Unit price
per 

Spec D Heavy-Duty Steel Front Bumper w/ LED's: Ram 1500 2013 - 2018
Spec D Heavy-Duty Steel Front Bumper w/ LED's: Ram 1500 2013 - 2018

Spec D Heavy-Duty Steel Front Bumper w/ LED's: Ram 1500 2013 - 2018

Spec D

Regular price $821.00 $608.00 26% off

Unit price
per 

Spec D Heavy-Duty Steel Rear Bumper (Black): Dodge Ram 1500 2009 - 2018
Spec D Heavy-Duty Steel Rear Bumper (Black): Dodge Ram 1500 2009 - 2018
Sold out

Spec D Heavy-Duty Steel Rear Bumper (Black): Dodge Ram 1500 2009 - 2018

Spec D

Regular price $751.80 $671.26 11% off

Unit price
per 

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