Cylinder Deactivation Kits

Active Fuel Management (AFM) and Displacement On Demand (DOD) systems are found on many modern engines, and they’re great for fuel efficiency. Basically, when the engine...

Active Fuel Management (AFM) and Displacement On Demand (DOD) systems are found on many modern engines, and they’re great for fuel efficiency. Basically, when the engine is under light loads, the system safely deactivates some of the cylinders.

However, performance drivers and engine builders have a many reasons to find these systems unnecessary. Competitive drivers usually prefer to have the power of all eight cylinders under their foot at all times. If you have a performance exhaust, the sound may become unpleasant when cylinders drop out. Older systems can also wear out and become unreliable over time.

There are devices...

There are devices available that override your computer to disable the AFM/DOD system, but if it’s really getting in your way, just delete it! Summit Racing Equipment carries cylinder deactivation delete combos that include all the parts you need to do the job, including a valley cover, lifters, gaskets, and hardware.

For more information on this subject, check out this article at OnAllCyinders.com, our official blog.

Top Brands

You’re probably wondering, “Does this delete combo really include everything I need to do the job?” Summit Racing Equipment is powered by enthusiasts just like you, and we ask the same questions before we sell any product. In addition to our own Summit Racing brand combo, we carry kits from Lingenfelter Performance, Trick Flow, and COMP Cams—all brands you can trust.

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Melling AFM/MDS Delete Combo

Melling offers their engine cylinder deactivation kits for converting active fuel management engines to non-active fuel management versions. These AFM (active fuel management) or MDS (multi-displacement system) delete combos include a variety of components to help complete the changeover. Order the Melling AFM/MDS delete combo best suited for your application. Each kit includes: * MDS delete camshaft (1) * Non-MDS hydraulic roller lifters (16) * Lifter guides for Non-MDS engines (4) Application dependent components include: * AFM/MDS solenoid plugs (4) * Camshaft thrust plate (1) * Variable Valve Timing (VVT) oil control valve (1) Notes: * When installing a delete cam, the active fuel management lifters must be replaced using non-active fuel management lifters. * The valve lifter guides used in non-active fuel management engines differ from those used in active fuel management engines and must be replaced for this application. * The AFM/MDS solenoids must be replaced using non-MDS plugs. * The vehicle engine control module/powertrain control module must be reprogrammed to turn off the active fuel management system in the operating software. * Pushrod length must be checked during installation to verify the correct length.

4.57 out of 5 stars ( 7 )

$640.99

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$1,394.99

Summit Racing™ Cylinder Deactivation Delete Combo Pro Packs

Shutting down your vehicle's fuel-saving cylinder deactivation system has its advantages. If your AFM lifters are failing or if you're doing performance upgrades, Summit Racing™ offers cylinder deactivation delete combo Pro Packs that will allow your vehicle to run on all cylinders and have full power at all times. Select the kit designed for your vehicle. Cylinder deactivation delete Pro Packs include: * ICT Billet LT lifter valley covers * Summit™ Performance LS7 hydraulic lifters * Summit™ lifter guides * BTR Gen V LT VVT cam timing bolts * ACDelco crankshaft front seal * ACDelco water pump gaskets * Mahle head gasket set * Fel-Pro head bolts * ACDelco harmonic balancer bolts

3.0 out of 5 stars ( 3 )

$856.90

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$948.90

Summit Racing™ Gen III Hemi MDS Delete Kits

Wanting to deactivate the Multi-Displacement System of your Hemi vehicle will require a few things, including a non-MDS camshaft and components. Summit Racing™ Gen III Hemi MDS delete kits are offered in versions designed for engines with or without Variable Valve Timing (VVT). They contain premium components (except programmer) to help you complete the job. Each Summit Racing™ delete kit will include a head gasket set, timing cover gasket, non-MDS lifters, replacement cylinder head fasteners, non-MDS solenoid plug, and camshaft, along with valve springs and/or camshaft phaser limiters. Choose the combo designed for your vehicle.

4.75 out of 5 stars ( 4 )

$1,383.90

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$1,585.83

Summit Racing™ Active Fuel Management Delete Combos

Summit Racing™ Active Fuel Management delete combos are designed to eliminate the cylinder deactivation system on GM Generation IV LS V8 engines. They include the correct hydraulic roller lifter set, a valve lifter guide set, new head bolts, and an engine valley cover. The combos are available with or without the necessary gaskets, pick a combo, add an aftermarket camshaft and you're ready to put that V8 power to the ground!

4.5 out of 5 stars ( 8 )

$610.89

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$624.88

COMP Cams DOD Delete Kits

COMP Cams DOD delete kits allow for removal of the displacement on demand (DOD)/active fuel management (AFM) systems that disable four engine cylinders under light-load conditions to improve fuel economy, but also limits performance in the process. COMP Cams delete kits are available in basic, standard, and premium levels with all the necessary components for each application.

Not Yet Reviewed

$541.99

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$796.95

Trick Flow® Active Fuel Management Standard Delete Kits

The problem: GM's AFM system is notorious for collapsed lifters causing cam failure and catastrophic engine damage. It's not a matter of "if", it's a matter of "when". On top of that, most performance camshafts for GM LS engines do not work well on engines equipped with Active Fuel Management (AFM). The solution? Trick Flow Active Fuel Management Delete Kits! Convert your failure prone AFM system before it's too late, and open the door to the world of performance camshafts available, giving you more power and better reliability! These standard delete kits include everything to completely remove the AFM cylinder deactivation hardware with all kits including GM LS7 hydraulic roller lifters, a valve lifter guide set, new head bolts, and head gaskets. Kits are available with no valley cover, a non-PCV valley cover, or a PCV valley cover – the PCV version includes the PCV hose and plug. A programmer capable of disabling the AFM software (sold separately) is required for proper engine operation.

4.63 out of 5 stars ( 8 )

$699.99

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$1,060.17

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