Butler/Comp Custom Cam & Lifter Master Kit Pontiac Xtreme Energy XE284H 284/296, 240/246, .507/.510, 110 Hyd BPI-K51-225-4

Butler custom cam master kits are designed and tested kits built with the parts we think are best for the application. Each kit has the correct cam/lifter/and spring combination with everything you need to perform a top end performance upgrade without guessing if it will work.

Cam: CCA-51-225-4
Pontiac Xtreme Energy XE284H 284/296, 240/246, .507/.510, 110 Hyd
• Quicker opening lobe profiles deliver increased responsiveness & more area under the lift curve
• More vacuum allows a step up in duration for greater performance
• Best seller; excellent all around performance in street carbureted applications

Lifters:CCA-852B-16 Comp Cams Pontiac Std. Hyd Lifter (Set)
• *Hy-lift Johnson/Made In The USA*

Timing Set: Pontiac Pro Billet Timing Set
• Billet Gears, 9 Keyway Crank Sprocket w/ Seamed Chain **Hone to fit if needed**

Valve Springs: CRO-68404
• 1.405 OD Dual Springs 113lbs @ 1.600" 284 @ 1.100, 304 @ 1.050, Coil Bind .950 (Set)

Valve Springs: CCA-986-16 (Cast Iron SD/RAIV and Edelbrock Heads)
• 1.430 Dual Spring 120 @ 1.780, 280 @ 1.250, Coil Bind 1.150 (Set)

Retainers:
• 10-Degree Chromoly Retainers (Set)

Also includes matching locks and seals

Notice: All flat tappet cams require break-in oil and the use of oil additives. They also require a more extensive break-in process.