The Kill Devil Diesel 6.7 Powerstroke Longblock

The Kill Devil Diesel 6.7 Powerstroke Longblock is built for owners who demand total reliability and strength. Whether you’ve experienced broken rocker arms, dropped valves, spun main bearings, or slipped crank gears, this engine is engineered to prevent those failures for good. Whether you’re towing every day for a living or chasing record-setting performance at the track, KDD has a longblock package designed to give you unmatched durability, higher horsepower, and the confidence to push your truck beyond factory limits.

S1 – Torque Series

For the owner who wants maximum reliability and torque for towing, daily driving, and longevity — without unnecessary complexity.

Features:

• KDD O-Ringed Cylinder Heads – Equipped with 100lb heavy-duty valve springs and inconel valves for unmatched durability.

• P1/ARP Head Studs – Locks down heads under high boost and heavy towing.

• Precision CNC Blueprint Machining – Starts with 100% new Genuine Ford block; CNC bore, deck, torque plate hone, and align honing for ultimate durability and superior ring seal. Magnafluxed and pressure tested; cam bearings and freeze plugs installed.

• Fully Balanced Rotating Assembly – Ensures smooth operation and long bearing life.

• Precision Tig-Welded Crank Gear - To Eliminate the crank gear from spinning under heavy load

• New 2020-Style Mahle Monotherm Steel Pistons – With rings, bearings, and gaskets from a Tier 1 OEM supplier.

• USA-Made Valvetrain – S1 Torque Series Camshaft engineered for massive low-end torque, quicker spool-up, and lower EGTs. Includes genuine Ford lifters, rockers, and KDD chromoly pushrods.

• Genuine Ford Connecting Rods

Performance Specs:
Rated for 600+ HP — ideal for stock to mild turbo/injector setups.

S2 – Sportsman Series Longblock

For those wanting stronger internals and higher performance while retaining streetable characteristics.

Features:

• CNC Ported KDD O-Ringed Cylinder Heads – 100% new Ford castings with partial intake and full exhaust porting for improved airflow, quicker spool-up, and lower EGTs.

• P1/ ARP Head Studs to eliminate head gasket failure

• KDD Proprietary Steel Piston Package – Forged steel pistons paired with USA-made Carrillo or Wagler H-beam rods.

• Total Seal Gapless Rings – Maximum sealing under extreme conditions, less blow-by, cleaner oil for longer life.

• USA-Made Valvetrain – S2 Sportsman Series Camshaft optimized for 1000–4000 RPM, new Ford lifters and rocker arms, KDD chromoly pushrods.

• Precision CNC Blueprint Machining – Starts with 100% new Genuine Ford block; CNC bore, deck, torque plate hone, and align honing for ultimate durability and superior ring seal. Magnafluxed and pressure tested; cam bearings and freeze plugs installed.

• Fully Balanced Rotating Assembly – Smooth operation for long bearing life.

• Precision Tig-Welded Crank Gear - To Eliminate the crank gear from spinning under heavy load

• KDD Billet Main Girdle & Main Studs – Secures main caps under high load and RPM.

• Competition Grade "H-Series" Bearings for maximum durability, made with more "crush" to prevent the bearings from spinning under heavy load

Performance Specs:
Rated for up to 1000HP — perfect for heavy towing, performance street builds, and mild track use (supports upgraded VGT, moderate single turbos, small compound turbos).

S3 – Outlaw Series Longblock

Competition-level 6.7 platform built for maximum power and reliability.

Features:

• CNC Ported KDD O-Ringed Cylinder Heads – Full intake and exhaust porting with proprietary billet intake plenum; extra-deep valve seat profile for KDD's S3 cam when used w/ steel pistons.

• P1 Heavy Duty or ARP 625 Series Head Studs + Main Studs – Extreme clamping strength for high boost and high-horsepower builds.

• KDD Proprietary Steel Piston Package – Forged steel pistons + USA-made Wagler billet rods.

• Total Seal Gapless Rings – Maximum sealing, virtually eliminates blow-by, reduces soot in oil for longer life.

• S2 Billet Camshaft: Built for maximum power output while retaining drivability.   (Upgrade to S3 camshaft optional, will require additional valve recession to the cylinder heads)

• KDD Exclusive Jesel Valvetrain System – Forged steel shaft-mounted adjustable roller rockers + DLC-coated solid roller lifters, built for 6000+ RPM.

• Precision CNC Blueprint Machining – Starts with 100% new Genuine Ford block; CNC bore, deck, torque plate hone, and align honing for ultimate durability and superior ring seal. Magnafluxed and pressure tested; cam bearings and freeze plugs installed.

• Fully Balanced Rotating Assembly – Smooth operation, long bearing life.

• Wagler Billet Main Caps & KDD Billet Girdle – Maximum bottom-end strength.

• Precision Tig-Welded Crank Gear - To Eliminate the crank gear from spinning under heavy load

• Competition Grade "H-Series" Bearings for maximum durability, made with more "crush" to prevent the bearings from spinning under heavy load

Performance Specs:
Rated for 1,500+ HP — ideal for compounds, nitrous, and track use. Not recommended for towing.

The Longblock Promise

Every longblock comes with a KDD Birth Certificate, documenting machining specs, tolerances, technician, date of completion, even down to cylinder wall crosshatch finish. Alongside it, you’ll receive your before-and-after balance sheet — proof of the precision and craftsmanship in every engine leaving our facility. We’re shoulder to shoulder with you from the first fire up to the winners circle.

Questions or customization?
📧 Sales@killdevildiesel.com | 📞 252-725-1222