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ProMaxx Performance

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ProMaxx 9601 Bare Aluminum Cylinder Head 34246 50.00 ProMaxx 9601 Bare Aluminum Cylinder Head
3 5 1
$ 1145
Upgrade your 2003-2005 Ford 6.0L Powerstroke cylinder heads with the ProMaxx 9601 Bare Aluminum Cylinder Head. With many years of testing, ProMaxx Aluminum Cylinder Heads have multiple advantages over the factory style cast heads such as increased flow, increased power, better cooling, and a weight reduction at over 42lbs less per cylinder head compared to stock. Starting with the bare casting, each head is manufactured from ultra-smooth 356 T-6 aluminum, the same proven material used in ProMaxx's famous racing heads. With multiple strength and design upgrades, these aluminum cylinder heads are solid behind the injector cups, have hardened seats and guides, and also have the strongest injector hold-down boss available. Sold as a bare casting without any valves, seals, or springs. This head is a perfect start for those that want to upgrade their valvetrain. This is a brand new casting with no core charge. 1 year warranty.Features:Bare CastingFor 18mm DowelsMutl-Angle Valve Job 25% Increased Air Flow Machined and Assembled In The USA! Sold Individually Note: Model year ranges are suggested applications. Please confirm dowel size on your truck before ordering.
ProMaxx 9602 Aluminum Cylinder Head 34247 50.00 ProMaxx 9602 Aluminum Cylinder Head
$ 1500
Upgrade your 2003-2005 Ford 6.0L Powerstroke cylinder heads with the ProMaxx 9602 Aluminum Cylinder Head. With many years of testing, ProMaxx Aluminum Cylinder Heads have multiple advantages over the factory style cast heads such as increased flow, increased power, better cooling, and a weight reduction at over 42lbs less per cylinder head compared to stock. Starting with the bare casting, each head is manufactured from ultra-smooth 356 T-6 aluminum, the same proven material used in ProMaxx's famous racing heads. With multiple strength and design upgrades, these aluminum cylinder heads are solid behind the injector cups, have hardened seats and guides, and also have the strongest injector hold-down boss available. Sold individually as a complete cylinder head with valves, valve seals, springs, retainers, and locks. This is a brand new casting with no core charge. 1 year warranty.Features:Sold Individually For 18mm DowelsMutl-Angle Valve Job 25% Increased Air Flow Machined and Assembled In The USA! Note: Model year ranges are suggested applications. Please confirm dowel size on your truck before ordering.
ProMaxx 9603 Bare Aluminum Cylinder Head (O-Ring) 34248 52.00 ProMaxx 9603 Bare Aluminum Cylinder Head (O-Ring)
$ 1319
Upgrade your 2003-2005 Ford 6.0L Powerstroke cylinder heads with the ProMaxx 9603 Bare Aluminum Cylinder Head with O-Rings. With many years of testing, ProMaxx Aluminum Cylinder Heads have multiple advantages over the factory style cast heads such as increased flow, increased power, better cooling, and a weight reduction at over 42lbs less per cylinder head compared to stock. Starting with the bare casting, each head is manufactured from ultra-smooth 356 T-6 aluminum, the same proven material used in ProMaxx's famous racing heads. With multiple strength and design upgrades, these aluminum cylinder heads are solid behind the injector cups, have hardened seats and guides, and also have the strongest injector hold-down boss available.An O-ringed head has been modified with a circular groove cut into the sealing surface. This groove is then filled with wire that protrudes slightly from the surface. When the head is installed, this wire pushes down on the factory gasket around the cylinder bore creating a stronger seal. This makes an O-ring head the perfect option for a mild to high performance build. ProMaxx Heads will come with the wire pre-installed.Sold as a bare casting without any valves, seals, or springs. This head is a perfect start for those that want to upgrade their valvetrain. This is a brand new casting with no core charge. 1 year warranty. Features:Bare CastingFor 18mm DowelsMutl-Angle Valve Job Machined For O-Rings25% Increased Air Flow Machined and Assembled In The USA! Sold Individually Note: Model year ranges are suggested applications. Please confirm dowel size on your truck before ordering.
ProMaxx 9604 Aluminum Cylinder Head (O-Ring) 34249 52.00 ProMaxx 9604 Aluminum Cylinder Head (O-Ring)
$ 1674
Upgrade your 2003-2005 Ford 6.0L Powerstroke cylinder heads with the ProMaxx 9604 Aluminum Cylinder Head with O-Ring. With many years of testing, ProMaxx Aluminum Cylinder Heads have multiple advantages over the factory style cast heads such as increased flow, increased power, better cooling, and a weight reduction at over 42lbs less per cylinder head compared to stock. Starting with the bare casting, each head is manufactured from ultra-smooth 356 T-6 aluminum, the same proven material used in ProMaxx's famous racing heads. With multiple strength and design upgrades, these aluminum cylinder heads are solid behind the injector cups, have hardened seats and guides, and also have the strongest injector hold-down boss available. An O-ringed head has been modified with a circular groove cut into the sealing surface. This groove is then filled with wire that protrudes slightly from the surface. When the head is installed, this wire pushes down on the factory gasket around the cylinder bore creating a stronger seal. This makes an O-ring head the perfect option for a mild to high performance build. ProMaxx Heads will come with the wire pre-installed.Sold individually as a complete cylinder head with valves, valve seals, springs, retainers, and locks. This is a brand new casting with no core charge. 1-year warranty. Features:Sold Individually For 18mm DowelsMutl-Angle Valve Job Machined For O-Rings25% Increased Air Flow Machined and Assembled In The USA! Note: Model year ranges are suggested applications. Please confirm dowel size on your truck before ordering.
ProMaxx CHE855N Replacement Cylinder Head 17903 70.00 ProMaxx CHE855N Replacement Cylinder Head
4 5 1
$ 418
ProMaxx Performance Cylinder Heads are designed as replacement cylinder heads with thicker castings in crack prone areas. Sold as a complete cylinder head with valves, valve seals, springs, retainers and locks, these new castings are sold without a core charge and come ready to install. Sold individually. Features: New Casting Sold Individually No Core Charge! Includes Valve Seals, Springs Improved Casting In "Problem Areas" Note: The standard heads will typically use a 1-piece intake and are normally found in truck applications. Please confirm what is in your vehicle before ordering.
ProMaxx CHE856N Replacement Cylinder Head 17904 70.00 ProMaxx CHE856N Replacement Cylinder Head
$ 396
ProMaxx Performance Cylinder Heads are designed as replacement cylinder heads with thicker castings in crack prone areas. Sold as a complete cylinder head with valves, valve seals, springs, retainers and locks, these new castings are sold without a core charge and come ready to install. Features: New Casting Sold Individually No Core Charge! Improved Casting In "Problem Areas" Note: Angled heads will use a 3-piece intake and are commonly found on Vans and Hummers. Please confirm what is in your vehicle before ordering.
ProMaxx CHR418N Replacement Cylinder Head 80590 95.00 ProMaxx CHR418N Replacement Cylinder Head
$ 603
The ProMaxx CHR418N Replacement Cylinder Head is a direct-fit replacement for the damaged or cracked cylinder head in your 3.9L Cummins 4BT powered vehicle. This cylinder head is a new casting and comes ready to install with all new valves, valve seals, springs, retainers and locks. There is core no charge on this head and it includes a 1 year limited warranty for peace of mind. Features: New Casting No Core Charge!Complete Cylinder HeadImproved Casting In "Problem Areas"
ProMaxx CHR618N Replacement Cylinder Head 17897 200.00 ProMaxx CHR618N Replacement Cylinder Head
$ 552
The ProMaxx CHR618N Replacement Cylinder Head replaces the damaged or cracked cylinder head in your 1994-1998 Dodge 5.9L Cummins. ProMaxx Performance Cylinder Heads are designed as replacement cylinder heads with thicker castings in crack prone areas. Sold as a complete cylinder head with valves, valve seals, springs, retainers and locks, these new castings are sold without a core charge and come ready to install. Features: New Casting No Core Charge! Improved Casting In "Problem Areas" Shipping Note: This product ships truck freight. To avoid any issues, you must pre-select the shipping option of commercial, or residential, as well as the lift gate and non lift gate option. If you do not have a forklift, you will need a lift gate.Truck Freight Item: Allow 1-2 weeks for delivery. Truck freight charges apply.
ProMaxx CHR620N Replacement Cylinder Head 17898 250.00 ProMaxx CHR620N Replacement Cylinder Head
1.667 5 3
$ 1432
The ProMaxx CHR620N Replacement Cylinder Head is a direct replacement for your 1998.5-2002 Dodge 5.9L Cummins casting #627. ProMaxx Performance Cylinder Heads are designed as replacement cylinder heads with thicker castings in crack prone areas. Sold as a complete cylinder head with valves, valve seals, springs, retainers and locks, these new castings are sold without a core charge and come ready to install. Features: New Casting No Core Charge! Fits Casting #627 Improved Casting In "Problem Areas" Shipping Note: This product ships truck freight. To avoid any issues, you must pre-select the shipping option of commercial, or residential, as well as the lift gate and non lift gate option. If you do not have a forklift, you will need a lift gate. Truck Freight Item: Allow 1-2 weeks for delivery. Truck freight charges apply.
ProMaxx CHR621N Replacement Cylinder Head 17902 250.00 ProMaxx CHR621N Replacement Cylinder Head
$ 1432
The ProMaxx CHR621N Replacement Cylinder Head for your 2007.5+ Dodge 6.7L Cummins is designed as replacement cylinder heads with thicker castings in crack prone areas. Sold as a complete cylinder head with valves, valve seals, springs, retainers and locks, these new castings are sold without a core charge and come ready to install. Features: New Casting No Core Charge!Improved Casting In "Problem Areas" Shipping Note: Truck freight charges apply.Truck Freight Item: Allow 1-2 weeks for delivery. If you do not have a forklift, you will need a lift gate. This product ships truck freight. To avoid any issues, you must pre-select the shipping option of commercial, or residential, as well as the lift gate and non lift gate option.
ProMaxx FOR852N Replacement Cylinder Head 29254 77.00 ProMaxx FOR852N Replacement Cylinder Head
$ 953
The ProMaxx FOR852N Replacement Cylinder Head is a high quality replacement for your 2008-2010 Ford 6.4L Powerstroke. Built with thicker castings in crack prone areas, the ProMaxx Cylinder Heads undergo extensive testing and quality control to ensure that you receive the best products possible for your 6.4L Powerstroke. ProMaxx performace the following tests and procedures: All heads are push rod clearanced, glow plugs and injectors are test fit, all recession depths are checked, all heads are pressure tested, all holes are tapped including glow plug threads and each head gets an in-house valve job. This is a brand new casting sold without a core charge. Sold individually. Features: New Casting Sold Individually Improved Design In "Problem Areas"
ProMaxx FOR852NB Bare Replacement Cylinder Head 29253 77.00 ProMaxx FOR852NB Bare Replacement Cylinder Head
$ 644
The ProMaxx FOR852NB Bare Replacement Cylinder Head is a high quality replacement for your 2008-2010 Ford 6.4L Powerstroke. Built with thicker castings in crack prone areas, these heads undergo extensive testing and quality control to ensure that you receive the best product possible for your 6.4L Powerstroke. ProMaxx performs the following tests and procedures: All heads are push rod clearanced, glow plugs and injectors are test fit, all recession depths are checked, all heads are pressure tested, and all holes are tapped including glow plug threads. Sold as a "bare" casting without any valves, seals or springs this head is a perfect start for those that want to upgrade their valve train. This is a brand new casting sold without a core charge. Sold individually. Features: Sold Individually New Bare Casting Improved Design In "Problem Areas"
ProMaxx FOR85XN Replacement Cylinder Head 17894 75.00 ProMaxx FOR85XN Replacement Cylinder Head
5 5 3
$ 922
The ProMaxx Performance Cylinder Heads are high quality replacements for your 2003-2007 Ford 6.0L Powerstroke. Built with thicker castings in crack prone areas, these heads undergo extensive testing and quality control to ensure that you receive the best product possible. ProMaxx performs the following tests and procedures: All fuel rails are drilled and checked, All heads are push rod clearanced, glow plugs and injectors are test fit, all recession depths are checked, all heads are pressure tested, all holes are tapped including glow plug threads and each head gets an in-house valve job. Sold individually as a complete cylinder head with valves, valve seals, springs, retainers and locks, these new castings are sold without a core charge and come ready to install. Sold individually. Features: New CastingSold Individually No Core Charge!Improved Casting In "Problem Areas" Available For 18MM and 20MM DowelsNote: Model year ranges are suggested applications. Please confirm dowel size on your truck before ordering.
ProMaxx FOR85XNB Bare Replacement Cylinder Head 23743 30.00 ProMaxx FOR85XNB Bare Replacement Cylinder Head
$ 613
The ProMaxx FOR85XNB Bare Replacement Cylinder Head is a high quality replacement for your 2003-2007 Ford 6.0L Powerstroke. Built with thicker castings in crack prone areas, these heads undergo extensive testing and quality control to ensure that you receive the best product possible. ProMaxx performs the following tests and procedures: All fuel rails are drilled and checked, all heads are push rod clearanced, glow plugs and injectors are test fit, all recession depths are checked, all heads are pressure tested, and all holes are tapped including glow plug threads. Sold as a "bare" casting without any valves, seals or springs this head is a perfect start for those that want to upgrade their valvetrain. These brand new castings are sold without a core charge. Features: New CastingSold IndividuallyNo Core Charge! Improved Casting In "Problem Areas" Available For 18MM and 20MM Dowels Note: Model year ranges are suggested applications. Please confirm dowel size on your truck before ordering.
XDP continues to closely monitor the COVID-19 (Coronavirus) outbreak. As an integral part of the automotive supply chain, at this point all call centers and distribution centers remain fully operational to ensure we keep vital service components flowing to vehicles used in transport of goods and emergency response. To ensure the health of our employees, families, and customers, we have made the following procedural changes:

  • Effective 3/16 we have shifted Customer Service hours to 8:30 – 7:00pm EST. To ensure compliance with New Jersey’s recent curfew.
  • Effective 3/18 we have decided to temporarily close both of our retail stores in NJ and NV.
  • Our technical sales team remains available Mon-Fri 8:30am-9pm and Saturday 10:30am-7pm EST.
  • All employees have been encouraged to follow the CDC's recommendations at home and in the workplace.
The circumstances of this virus are fast moving, as such, we will continue to update you with any further operational adjustments as needed. As always, we value your business and appreciate your patience as we manage this situation together.