• Assembled heads come with titanium retainers,
10 degree locks, seals, spring cups, Comp 947
Pacaloy springs good up to .820” roller cam
• Customer must supply cam specs
• 426-27 Indy roller rockers recommended
• Uses any aftermarket adjustable rocker from
stock type Hemi head
• Accepts any Hemi rocker shafts
• Exhaust valve angle is 2 degrees toward cylinder wall
• 426-1RA has raised exhaust port (+.750” taller)
• Intake port volume 251cc
• Exhaust port volume 117cc
• Features +.350” longer intake valve and raised
intake port
• Intake valve diameter 2.400” - 5.900” overall length
• Exhaust valve diameter 1.940” - 5.080” overall length
• 2.00” exhaust valve diameter is optional
• 170cc combustion chamber volume
• 2” spring height, spring seats 1.550”, can cut 1.625”
• Intake gasket Indy #258
• Exhaust header gasket Indy #266
• Valve cover gasket Indy #262
• Head studs: ARP #426-23 for Indy Maxx block
• Head studs: ARP #426-22 for steel Mega block
• Valve guides 11/32 solid bronze
• 3/4 reach gasket seat spark plugs
• Champion C57CX (cold) to C63CX (hot)
• Fits standard Hemi block
• Has both 16 and 10 intake bolt pattern
• Accepts stock and Indy intake manifolds
• Best intake selection Indy 426-4 single plane 4500
• Must use 440-6R Indy valley plate
• Must use 426-10 shaft clamp kit
• Must use 426-12 extra clearance valve covers
