BBC MAGNUM 357CC FULL CNC COMPRECT.121CC CHAMBER

Description

If “Dirty Harry”
drove a racecar, it would
certainly be fitted with a
pair of AFR 357cc
“Magnum” cylinder
heads. If huge horsepower is
what you are searching for,
either of these castings will
certainly deliver. With fully
CNC ported 357cc flowing 425
CFM, these cyilnder heads
represent the ultimate in
airflow for your BB
Chevrolet. Our 357
“Magnum” flows over
415 CFM @ .700 valve lift! No
other production style BB
Chevy head even comes close.
These cyilnder heads were
targeted at larger cubic inch
engines (509-632 CID) looking
for maximum horsepower and
rpm capability with a primary
operating range of 3500-8000
rpm’s (This range is an
average and will vary with
engine displacement and
component selection). As
well, these aluminum heads
provide impressive torque
figures at higher rpm levels.
Blown, turbo, and nitrous
engines will especially like
the larger, higher flowing
intake ports. AFR BBC 357cc
cylinder heads will work best
with camshafts exceeding .750
gross valve lift to make
better use of the substantial
airflow found in the higher
lift range. The 357cc come
standard with AFR’s trademark
.750″ thick cylinder
head deck, reinforced rocker
stud bosses, and are equipped
with premium one piece
stainless steel 2.300″
intake valves and 1.880″
exhaust valves. Standard
combustion chamber volume is
121cc for our 357cc BBC.
Properly selecting the
correct cylinder head depends
on a large number of
variables.

Basic
Package Components:

• 5-angle valve job
• 100% CNC Ported
  Chambers, Exhaust, and Intake
• Intake Valve,
  2.300″ stainless steel
• Exhaust Valve,
  1.880″ stainless steel
• 1.625 O.D. Roller
  Dual Valve Spring with
  dampener 255 lbs. on seat,
  .750″ maximum lift
• 10° Chrome Moly
  Retainer
• 10°
  Valve Locks
• Guide
  Plates
• Viton Valve
  Seals
• Hardened Spring
  Cup
• Intake Valve
  Seats
• Exhaust Valve
  Seats
• Bronze Valve
  Guides Intake
• Bronze
  Valve Guides Exhaust
• AFR BB Chevy 7/16 Exhaust
  Studs
• AFR BB Chevy
  7/16 Intake Studs