.480/.450 | 256/270 | 204/214 @.050 | 109 LSA (1° Advance)

FOR AMC 258 ENGINES THAT WANT TO FLY LOW AND PULL HARD.

The Duck This Camshaft blends old-school grunt with new-school tech, giving your AMC 258 a serious wake-up call from idle to 5000 RPM. With .480”/.450” lift, 256°/270° duration, and 204°/214° @.050”, this cam delivers streetable torque with a fun, rowdy edge. A tight 109° LSA and 1° advance sharpen throttle response while keeping your powerband punchy and usable.

✅ Hydraulic roller grind – smooth lift, modern performance

✅ Powerband: idle to 5000 RPM – perfect for street machines and cruisers

✅ No fancy parts needed – stock carb and manifold are totally ducking fine

✅ Strong torque and mid-range pull – makes that old 258 feel brand-new

✅ Lopey idle with just enough attitude – people will ask what’s in it

Warning: May cause flocks of ducks to nod in approval. Side effects include uncontrollable grinning and excessive tire chirping.