AFM/DOD delete for LS cam swaps
This video is a starting point for understanding why AFM/DOD parts need to be removed or replaced when cam swapping certain Gen IV LS engines.
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AFM / DOD
Cam Gear
Before Buying
Gen IV cam swaps
Gen IV LS cam kits need extra AFM/DOD planning.
Many Gen IV LS truck engines can be equipped with AFM/DOD and some also use VVT. Before ordering a cam kit, verify whether your engine has AFM/DOD, VVT, and which cam gear style it uses.
Required Gen IV research
AFM/DOD delete and cam swap planning
On Gen IV LS engines equipped with AFM/DOD, a cam swap usually requires deleting the AFM/DOD hardware and tuning it out. Some VVT-equipped engines may also need VVT delete or conversion parts depending on the camshaft kit. Before ordering, confirm whether the engine has AFM/DOD, VVT, and the correct cam gear style so the camshaft kit and delete parts match the build.
Gen IV cam kits should be planned as a complete cam swap package, including the camshaft, required AFM/DOD or VVT delete parts when needed, front timing cover gasket, crank bolt, and supporting valvetrain parts.
AFM/DOD delete is usually required
Gen IV engines with AFM/DOD use special lifters and supporting hardware. A normal performance cam swap should be planned with an AFM/DOD delete kit and the correct tune.
1-bolt to 3-bolt cam gear conversion kit
Many Gen IV cam swaps need a 3-bolt camshaft conversion. This kit includes the timing chain parts needed to match a 3-bolt camshaft setup.
View itemVerify AFM/DOD and VVT first
Check the exact engine code and vehicle year before buying parts. Some Gen IV engines may require VVT delete parts, a non-VVT timing cover setup, or a cam kit designed for the factory VVT system.
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