Discounts & Coupon Codes

HHP Sales, Promotions & Coupon Codes

At HHP, we know you love to save on the best parts for your car from the best HEMI shop on the planet, so we're making sure you know all about our current promotions and offers.

Want MORE Savings? Check Out These Programs:

• Join Our FREE VIP List! CLICK HERE
• Military, Veteran, or First Responder? CLICK HERE
• Interested in Our B2B Wholesale Program? CLICK HERE

• MICKEY THOMPSON REBATES: Street & Strip Tires purchased from HHP between February 15 and March 31, 2026, are eligible. PLEASE CLICK HERE FOR INFORMATION & HERE TO SUBMIT YOUR REBATE.
  This offer is contingent on the purchase of a minimum of one set of two (2) qualifying tires. Reward requests must be submitted online no later than May 31, 2026. Late submissions will not be accepted. Reward Amount: Amount of the reward depends on the qualifying tires purchased and the availability of qualifying new tires at the time of purchase. A $50 reward is available for the purchase of the following qualifying tires purchased as a set of two (2): ET Drag, ET Front Dragster, ET Drag Pro Drag Radial, Pro Bracket Radial, ET Front, ET Street R, ET Street R Bias, ET Street S/S, E Street Radial Pro, ET Street Front, ET Drag Motorcycle, Street Comp, Sportsman S/R, Sportsman S/T, Sportsman Front. Substitutions are not eligible all requirements set forth herein must be met to be eligible.

• PCM UNLOCK COMBO DEALS: Buy any DiabloSport or HP Tuners handheld and SAVE on PCM unlocks and bypass cables, or buy a PCM unlock or bypass cable and SAVE on a Trinity tuner - just add everything to your cart to see the lower combo pricing!
  
  

• HHP flash sales comin' in hot! Save with a new deal every week when you use the code!

  SAVE ON	START	END	HOW TO GET IT
  HHP by Kooks Competition Headers	April 13	April 19	use code: KOOKED
  Plazmaman CNC Billet Intake Manifold	April 20	Apri 26	use code: PLAZMAD
  Driveshaft Shop 2,000HP Level 5 axles	April 27	May 3	Check the Box
  AWE exhausts	May 6	May 9	add to cart
  DiabloSport	May 6	May 10	prices as listed
  Nick Williams throttle bodies	May 11	May 17	use code: TBODY
  HHP 426 BOHEMI Short Block Stroker	May 18	May 24	use code: HEMITH

• Overstock Parts, Full Category - Additional Add-To-Cart discounts will automatically apply to all parts in this category.