Page 535 - 2021-22 Auto Performance_Circle Track

Intake Manifold Gaskets
Gaskets combine a con-

a double-perforated steel
core and silicone-beaded
sealed ports to help main-
tain an effective seal, even under high-vacuum conditions or exposure to fuel and oil.
Valve Cover Gaskets
Durable, long-lasting gaskets are offered in severe-duty,

silicone/cork material.
Part No.
Application Type
Thickness
M77VS50755
SB Chevy, 1959-85
Molded Rubber/Steel Carrier
.225"
M77VS50762
SB Chevy, Dart/Buick
Laminated Cork/Composite
.250"
M77VS50763
SB Chevy, Splayed Valve Heads
Steel Core Composite/PTFE
.080"
M77VS50764
SB Chevy, SB2.2 #12480011
Steel Core Composite/PTFE
.080"
M77VS50765
SB Chevy, 12°/14°
Steel Core Composite/PTFE
.080"
M77VS50768
SB Chevy, 1986-97 Centerbolt
Laminated Cork/Composite
.250"
M77VS50769
SB Chevy, 1959-85
Laminated Cork/Composite
.250"
M77VS50771
SB Chevy, 1986-97 Centerbolt
Steel Core Composite/PTFE
.080"
M77VS50756
SB Ford 289-351W
Molded Rubber/Steel Carrier
.225"
M77VS50788
SB Ford 289-351W
Steel Core Composite/PTFE
.080"
M77VS50791
SB Ford 289-351W
Laminated Cork/Composite
.250"
M77VS50792
SB Ford 289-351W
Laminated Cork/Composite
.125"
M77VS50793
SB Ford 289-351W
High Temp. Composite
.060"
Part No.
Application
Port Size
Thickness
M77MS20009 SB Chevy, Tapered Port 2.100" Dia. .060"
M77MS20010 SB Chevy, Stock Port 1.20" x 2.01" .060"
M77MS20012 SB Chevy, Rect. Port 1.26" x 2.18" .060"
M77MS20013 SB Chevy, Pro Action/RHS 14° 1.36" x 2.19" .060"
M77MS20014 SB Chevy, 23° Medium Port 1.25" x 2.20" .060"
M77MS20015 SB Chevy, Dart Little Chief 1.44" x 2.29" .060"
M77MS20016 SB Chevy, Brodix WP287/12X/12RP 1.41" x 2.50" .060"
M77MS20017 SB Chevy, 23° Large Port 1.30" x 2.25" .060"
M77MS20018 SB Chevy, Rect. Port 1.25" x 2.20" .120"
M77MS20019 SB Chevy, 23° X-Large Port 1.38" x 2.30" .060"
M77MS20022 SB Chevy, 23° X-Lg. 1.38" x 2.30" .120" Race/Brodix 12SP-S
M77MS20023 SB Chevy, Dart/Buick 1.60" x 2.90" .060"
M77MS20024 SB Chevy, GM Perf. Splayed, Trim to Fit 1.50" x 2.00" .060"
M77MS20025 SB Chevy, SB2.2, Trim to Fit 1.39" x 1.90" .060"
M77MS20039 BB Chevy, Stock Oval Port 1.80” x 2.03” .060”
M77MS20056 GM LS1/LS2/LS6, Rect. Ports 1.15" x 3.37" .030"
M77MS20057 GM LS1/LS2/LS6, Rect. Ports 1.15" x 3.37" .060"
M77MS20058 GM LS1/LS2/LS6, Rect. Ports 1.15" x 3.37" .120"
M77MS20059 GM LS7/C5R/World LS7X, Rect. Ports 1.37" x 2.41" .030"
M77MS20060 GM LS7/C5R/World LS7X, Rect. Ports 1.37" x 2.41" .060"
M77MS20061 GM LS7/C5R/World LS7X, Rect. Ports 1.37" x 2.41" .120"
M77MS20064 GM LS L92, Rect. Ports 1.25" x 2.50" .030"
M77MS20065 GM LS L92, Rect. Ports 1.25" x 2.50" .060"
M77MS20066 GM LS L92, Rect. Ports 1.25" x 2.50" .120"
M77MS20069 SB Ford 260-351W 1.10" x 2.00" .060"
M77MS20070 SB Ford 260-351W, GT40/N351/Sports. 1.31" x 2.15" .060"
M77MS20071 SB Ford, Trick Flow "R" Series 1.37" x 2.30" .060"
M77MS20072 SB Ford 260-351W, SVO Yates C3 1.85" x 2.22" .060"
M77MS20073 SB Ford 260-351W, SVO Yates C3/C302 1.47" x 2.31" .060"
Valley Cover Gaskets
M77MS20020
SB Chevy, Pro Action/RHS 14°
N/A
.060"
M77MS20021
SB Chevy, GM Performance SB2.2
N/A
.060"
Molded Rubber Oil Pan Gaskets
Compressible, high-density rubberized

eliminate leak paths.
Part No. Application
Type
Thickness
M77OS30568RRH
SB Chevy, 1980-85, RH Dipstick
Molded Rubber
N/A
M77OS32457
SB Chevy, 1975-79 Thick Ft. Seal, LH Dipstick
Molded Rubber/ Steel Carrier
.185"
M77OS32496B
SB Chevy, 1986-97 Thick Ft. Seal, RH Dipstick
Molded Rubber/ Rigid Carrier
.185"
M77OS32522
SB Chevy, 1957-74 Thin Ft. Seal, LH Dipstick
Rubberized Fiber
.093"
M77OS32523
SB Chevy, 1975-79 Thick Ft. Seal, LH Dipstick
Rubberized Fiber
.093"
M77OS32525
SB Chevy, 1986-97 Thick Ft. Seal, RH Dipstick
Laminate PTFE/ Steel Carrier
.080"
M77OS32516
SB Ford 260-302
Rubberized Fiber
.093"
M77OS32490
SB Ford 351W, 1969-93
Rubberized Fiber
.093"
M77OS32491
SB Ford, 1962-82 260-302; 1983-95 5.0L
Molded Rubber/ Steel Carrier
.185"
SB Chevy Timing Cover Gasket NEW! M77T27781VC
GM “604” Crate Engine Pistons

Power Pak
Domed Piston Kits
Forged, domed pistons with radiused valve pockets are machined for 1.5mm top, 1.5mm second, and 3.0mm oil rings. Sets of eight include wrist pins, locks, and performance piston rings.
Forged 4032 alloy pistons deliver improved durability compared to the OEM cast pistons found in GM “604” crate engines. Identical in design

accept stock-sized 1.5mm and 2mm compression rings, and 4mm oil rings. Approved by a wide variety of sanctioning bodies. Sets of eight with
Rod Part No. Bore Stroke Length
Rod Comp.
Dome Volume
Comp. Ratio
Part No.
Bore Stroke
Length
Height
Small Block Chevy
MAH930207930
4.030"
3.48"/3.50"
6.000"
1.250"
11cc
13.0:1
MAH930208130
4.030"
3.48"/3.50"
6.125"
1.125"
11cc
13.0:1
MAH930207940
4.040"
3.48"/3.50"
6.000"
1.250"
11.1cc
12.9:1
MAH930208340
4.040"
3.48"/3.50"
6.125"
1.125"
6.0cc
12.0:1
MAH930207960
4.060"
3.48"/3.50"
6.000"
1.250"
11cc
13.0:1
MAH930212525
4.125"
3.750"
6.000"
1.125"
4cc
13.0:1
MAH930212555
4.155"
3.750"
6.000"
1.125"
4cc
13.0:1
MAH930208855
4.155"
4.000"
6.000"
1.000"
4cc
13.9:1
MAH930212565
4.165"
3.48"/3.50"
6.125"
1.125"
4cc
12.3:1
MAH197754565*
4.165"
3.500"
6.125"
1.125"
9.0cc
13.2:1
MAH930208265
4.165"
3.750"
6.000"
1.125"
11cc
14.3:1
Comp. Height
Dome Volume
Comp. Ratio
Small Block Chevy
MAH930127805
4.005"
3.480"
5.700"
1.559"
-4.9cc
9.93:1
MAH930127820
4.020"
3.480"
5.700"
1.559"
-4.9cc
9.93:1
MAH930127830
4.030"
3.480"
5.700"
1.559"
-4.9cc
9.93:1
Note: Small block Chevy compression ratios are based on a 64cc combustion chamber.
Notes: In addition to the rod and stroke combinations listed with each part number, other rod/stroke combinations may work. Compression ratios are based on a 64cc combustion chamber. *Pistons are machined for and sold with 1.0mm top, 1.0mm second, and 2.0mm oil rings.
CIRCLE 2021-22 533 TRACK