Chevy Big Block Complete 2.25 Stainless Intake Valve 1.88 Stainless Exhaust Valve 396/454 Aluminum Heads 119cc Chamber 320cc Rectangle Intake Runner '' SOLD WORLD WIDE ''
Details
HEAD GASKETS
Due to the wide combustion chamber needed to fit around the large 2.250/ 1.880”
valves, These gaskets are .041” thick, and fit bore sizes as large as 4.540” on
all Mark IV and VI blocks, as well as aftermarket blocks. Felpro 1017 gaskets
will also work with these head/ block combos.
INTAKE GASKETS
Rectangular Port Heads use FelPro 1275 or 1275-5 gasket, depending on the
thickness you require.
SPARK PLUGS
Our heads require the use of 14mm. x 3/4” reach 5/8” hex gasket seat
sparkplugs. Some recommended plugs are; NGK BCPR6ES or R5671A-7, Champion
RC12YC, Autolite AR3923 or AR3924. Remember these are for mild street engines.
Higher compression or boost requires colder sparkplugs!
HEAD BOLTS / STUDS
Due to the raised (+.625”) exhaust port location on our heads, +.100” longer
bolts / studs are needed next to each port. Use our PC2452-6100 head stud Kit.
ARP #135-3703 12pt. Head bolts, and #235-4303 Head studs work too. If you
already have a standard BBC head stud kit and are just looking for the 8 +.100”
studs, use our PC2452-6100-8 or ARP # 235-4306. These heads should be torqued
to 65ft.lbs. using high pressure moly lube or 70ft.lbs. using 30wt. oil.
Please consult your fastener manufacturer for their specific recommended torque
values.
EXHAUST GASKETS
Our BBC heads utilize a 1.88” x 1.88” square exhaust port. This exhaust port
requires specific gaskets. Felpro also offers gaskets that work with our heads
as # 1410.
Additional Information
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