2021-22 Circle Track Catalog

Iron Eagle Cylinder Heads for SB Chevy ,QFUHDVHWKHSHUIRUPDQFHRIDQ\VPDOOEORFN&KHY\,URQ(DJOHKHDGVDUHRIIHUHGZLWKFFFFFFFFFFRU FFLQWDNHUXQQHUV+LJKYHORFLW\FFKHDGVGHOLYHULQVWDQWWKURWWOHUHVSRQVHZKLOHWKHODUJHSRUWFFKHDGVPHHWWKHQHHGV RIODUJHGLVSODFHPHQWKLJK530HQJLQHV0XOWLDQJOHLQWDNHVHDWVDQGKDUGHQHGUDGLXVHGH[KDXVWVHDWVSURPRWHH[FHSWLRQDODLU ÀRZZLWKRXWDQ\DGGLWLRQDOSRUWLQJ%DUHKHDGVIHDWXUHEURQ]HYDOYHJXLGHVDQGDSHUIRUPDQFHYDOYHMRE&1&SRUWHGYHUVLRQVDUH DOVRDYDLODEOH+HDGVDUHVROGLQGLYLGXDOO\EDUHRUFRPSOHWHO\DVVHPEOHG

Intake Runner

Comb. Chamber

Plug Type

Intake Valve

Exhaust Valve

Valve Spring Dia./Type

Part No.

Description

DRT10024267 Bare Casting 165cc 76cc Straight 2.02" 1.60" DRT10024360 Bare Casting 165cc 76cc Straight 1.94" 1.50" DRT10110010F Bare Casting 180cc 49cc Angle 2.02" 1.60" DRT10310010P Bare Casting 200cc 64cc Angle 2.02" 1.60" DRT10310010PF Bare Casting 200cc 49cc Angle 2.02" 1.60" DRT10320010P Bare Casting 200cc 64cc Straight 2.02" 1.60" DRT10321111P Assembled 200cc 64cc Straight 2.02" 1.60" DRT10321112P Assembled 200cc 64cc Straight 2.02" 1.60" DRT10510020P Bare Casting 215cc 64cc Angle 2.05" 1.60" DRT10510020PF Bare Casting 215cc 49cc Angle 2.05" 1.60" DRT10511122P Assembled 215cc 64cc Angle 2.05" 1.60"

N/A N/A N/A N/A N/A N/A

1.250"/Hyd. 1.437"/Solid

N/A N/A

1.437"/Solid DRT10511123P Assembled 215cc 64cc Angle 2.05" 1.60" 1.550"/Solid/Roller DRT10520020P Bare Casting 215cc 64cc Straight 2.05" 1.60" N/A DRT10521122P Assembled 215cc 64cc Straight 2.05" 1.60" 1.437"/Solid DRT10710040P Bare Casting 230cc 64cc Angle 2.08" 1.60" N/A DRT10710040PF Bare Casting 230cc 49cc Angle 2.08" 1.60" N/A DRT10720040P Bare Casting 230cc 64cc Straight 2.08" 1.60" N/A CNC-Ported DRT10970040 Bare Casting 227cc 72cc Angle 2.08" 1.60" N/A DRT10971143 Assembled 227cc 72cc Angle 2.08" 1.60" 1.550"/Solid/Roller DRT11980060P Bare Casting 245cc 66cc Angle 2.10" 1.60" N/A SHP Cylinder Heads for SB Chevy 6+3F\OLQGHUKHDGVFRPELQHWKHEHQH¿WVRIDQHFRQRPLFDOSULFHWKHZHLJKWVDY - LQJVDVVRFLDWHGZLWKDOXPLQXPKHDGVDQGIXOOFRPSDWLELOLW\ZLWKPRVWRIIWKHVKHOI FRPSRQHQWV&DVWIURP$7DOXPLQXPKHDGVIHDWXUHVWDQGDUGYDOYHDQJOH VWDQGDUGVSDFLQJVWUDLJKWSOXJFRQ¿JXUDWLRQEURQ]HYDOYHJXLGHVDQGFRPSHWL - WLRQYDOYHMREV2IIHUHGZLWKFFRUFFLQWDNHUXQQHUVVROGLQGLYLGXDOO\)XOO\ DVVHPEOHGRUEDUHFDVWLQJV

Intake Runner

Comb. Chamber

Intake Valve 2.02" 2.02" 2.02" 2.02" 2.02" 2.02" 2.02" 2.02"

Exhaust Valve 1.60"

Valve Spring Dia./Type

Part No.

Description

DRT127111 Bare Casting 180cc

64cc 64cc 64cc 72cc 72cc 64cc 64cc 72cc

N/A

DRT127121 DRT127122 DRT127221 DRT127222 DRT127322 DRT127422

Assembled 180cc Assembled 180cc Assembled 180cc Assembled 180cc Assembled 200cc Assembled 200cc

1.60" 1.250"/Single 1.60" 1.437"/Dual 1.60" 1.250"/Single 1.60" 1.437"/Dual 1.60" 1.437"/Dual 1.60" 1.437"/Dual 1.60" N/A

DRT127311 Bare Casting 200cc

Pro 1 Cylinder Heads for SB Chevy $IIRUGDEOH3URDOXPLQXPF\OLQGHUKHDGVZLWKDGYDQFHGDLUÀRZWHFKQRORJ\ RIIHURXWVWDQGLQJDLUÀRZZLWKQRDGGLWLRQDOSRUWZRUN&KRRVHIURPFFFF RUFFLQWDNHUXQQHUVRU&1&SRUWHGFFLQWDNHUXQQHUF\OLQGHUKHDGV%DUH FDVWLQJKDVDPXOWLDQJOHSHUIRUPDQFHYDOYHMREDQGEURQ]HYDOYHJXLGHV9DOYH WUDLQFRPSRQHQWVIRUEDUHKHDGVPD\EHDGGHGE\SXUFKDVLQJWKHFRUUHVSRQGLQJ SDUWVNLW+HDGLVVROGLQGLYLGXDOO\EDUHRUFRPSOHWHO\DVVHPEOHG

Intake Runner

Comb. Chamber

Plug Type

Intake Valve

Exhaust Valve

Valve Spring Dia./Type

Part No.

Description

DRT11310010P Bare Casting 200cc 64cc Angle 2.02" 1.60" DRT11320010P Bare Casting 200cc 64cc Straight 2.02" 1.60" DRT11510020P Bare Casting 215cc 64cc Angle 2.05" 1.60" DRT11511122P Assembled 215cc 64cc Angle 2.05" 1.60"

N/A N/A N/A

1.437"/Dual DRT11511123P Assembled 215cc 64cc Angle 2.05" 1.60" 1.550"/Solid/Roller DRT11710040P Bare Casting 230cc 64cc Angle 2.08" 1.60" N/A DRT11711143P Assembled 230cc 64cc Angle 2.08" 1.60" 1.550"/Solid/Roller DRT11721143P Assembled 230cc 64cc Straight 2.08" 1.60" 1.550"/Solid/Roller CNC-Ported DRT11970040P Bare Casting 227cc 64cc Angle 2.08" 1.60" N/A DRT11971143P Assembled 227cc 64cc Angle 2.08" 1.60" 1.550"/Solid/Roller

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CIRCLE TRACK 2021-22

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