Air and Fuel› Fuel Injection Systems and Components - Electronic

Graveyard Performance

Gravedigger Returnless Port Injection Fuel System

$509.99

SKU: GP-MS36-PIKIT-1

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Special Order
Ships in 4–6 weeks
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$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The Graveyard Performance Gravedigger fuel system is a returnless port injection kit designed for Mazdaspeed 3 and 6 vehicles. This system is capable of flowing up to 600whp with supporting modifications.
Show original supplier description
The Graveyard Performance Gravedigger Returnless Port Injection Fuel System is a carefully curated kit designed to enhance fuel delivery for Mazdaspeed 3 and 6 models. This system offers a budget-friendly pathway to port injection, providing the capability to support up to 600 wheel horsepower with appropriate supporting modifications. For power levels exceeding this, a fuel cell or surge tank will be necessary. The kit connects to the OEM fuel line at the firewall and returns to the High Pressure Fuel Pump (HPFP) to feed the Direct Injection (DI) injectors. Included components are Alpha Injection Clinic 1000CC Injectors and Graveyard Performance -6 PTFE Custom Fuel Lines. Optional components available for purchase include Aeromotive 325LPH Stealth or AEM 340LPH in-tank fuel pumps, and MoTiv Reflex Lite or MoTiv Reflex Lite with Plug and Play Harness fuel controllers. The fuel rail/manifold is selected via a dropdown menu. Installation is rated as expert difficulty and is estimated to take approximately 5 hours, requiring a full socket set, fuel line tools, and electrical tools. Extensive wiring and manifold installation are necessary. Due to the complexity, professional installation is recommended. It is crucial to note that this product is designated for off-road race use only, including closed-course and sanctioned open-course racing. It is not intended or legal for use on public highways or roads, or for recreational off-road use.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandGraveyard Performance
Part NumberGP-MS36-PIKIT-1
CategoryAir and Fuel
5,000+ Trusted brands
1M+ Enthusiasts
5M+ Parts sold
(760) 282-4645 hello@motormia.co

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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