Mazdaspeed 3/6 Gravedigger Returnless Fuel Line Kit
Mazdaspeed 3/6 Gravedigger Returnless Fuel Line Kit
SKU:GP-MZR-FL-1
On this page you’re looking at the fuel line kit made by us in house here at Graveyard! Some people look to piece together their own fuel systems, but don’t have the necessary tools to make and assemble their fuel lines. We have gone ahead and taken care of that for our customers.
We use high quality PTFE Line, which has a lifetime use for pump gas, and E85!
Included is the following:
- 2 x 5/16 Quick Connect Fittings
- 2 x -6AN to -6ORB Fittings (CS/Damond Spacer Rails) - Optional 10AN for JMF
- 1 x Rail to HPFP Line
- 1 x Factory Line to Fuel Rail Line
If you are going to run a CPE Havoc, you will need a -8ORB fitting which we can substitute at no additional cost.
🔧 Installation Difficulty: Basic
⏱️ Time Required: 30 minutes
🔧 Tools Needed: Basic hand tools
⚠️ Prerequisites: Requires aftermarket port injection fuel rail
💡 Quick installation for modified fuel systems
Email sales@graveyardperformance.com for any question you may have.
If you are looking for a full kit for your Mazdaspeed, click here
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Rated Excellent & Trusted

I had some fitment issues when installing these lines. Both seem to be short. Also I wish the quick connect fitting on the feed line was either 45° or straight. Will update in the future.
Just put the car together on 5/21, Overall it's holding fuel pressure with no leaks.
My experience with Nick was smooth and professional. No booty pics tho 😔