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Street Performance & Racing Heads
 Oval Aluminum Heads
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Specs |
Intake Port |
Material |
Chamber Volume |
Valve Int/Ext |
Engine and Performance Recommandations |
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Dart 265 |
265cc |
Aluminum |
119cc |
2.25/1.88" |
Street Performance, maximum torque under 7000 rpm under 482 ci |
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Flow, Intake: |
275cc - 336 cfm 298cc- 381 cfm @ .750 lift/28” |
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Flow, Exhaust: |
128cc- 255 cfm 143cc- 280 cfm @ .750 lift/28” |
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Iron Heads
$800 to $1000 Each
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Specs |
Intake Port |
Material |
Chamber Volume |
Valves Int/Ext |
Engine and Performance Recommendations |
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Iron Eagle |
308cc |
Cast Iron |
119cc |
2.25/1.88" |
Street Performance, mild Bracket Racing, Marine under 7000 rpm, under 500 ci |
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Iron Eagle |
345cc |
Cast Iron |
119cc |
2.30/1.88" |
Maximum street performance and Bracket Racing, Heads-Up and Super Classes over 7000 rpm, 500+ci |
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Flow, Intake: |
(308) 363 cfm (345) 390 cfm @.800 lift/28” |
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Flow, Exhaust: |
266 cfm @.800 lift/28” (Our valves, +10/15 cfm better) |
 Regtangle Ports $1600 to $2000 Each
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Specs |
Intake Port |
Material |
Chamber Volume |
Valve Int/Ext |
Engine and Performance Recommandations |
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Dart 360 |
355cc |
Aluminum |
119cc |
2.30/1.90" |
Maximum Competition, good with alcohol, nitrous supercharged engine & light car, manual or clutchless transmission over 8000 rpm (titanium valves recommeneded), over 540 ci |
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Dart 370 Oval |
366cc |
Aluminum |
119cc |
2.30/1.88" |
Maximum Competition, normally aspirated, ggod with heavy car, power glide over 7000 rpm, 525+ ci |
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Flow, Intake:
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(355) - 415 cfm (366) - 377 cfm @ .750 lift/28”
(F/P) (355) - 389 cfm (366) - 399 cfm @ .750 lift/28” |
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Flow, Exhaust: |
(S/M) 255 cfm (F/P) 280 cfm @.750 lift/28” |
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Aluminum and CNC Ported Heads
$1200 to $1600 Each
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Specs |
Intake Port |
Material |
Chamber Volume |
Valve Int/Ext |
Engine and Performance Recommendations |
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PRO 1 |
310cc |
Aluminum |
119cc |
2.25/1.88" |
Street Performance, mild Bracket Racing, Marine under 7000 rpm, under 500 ci |
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PRO 1 |
325cc |
Aluminum |
119cc |
2.25/1.88" |
Serious Street Performance and Bracket Racing over 7000 rpm, 468/525 ci |
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PRO 1 CNC |
335cc |
Aluminum |
119cc |
2.30/1.88" |
Maximum Performance, Bracket Racing, Heads-Up & Super Classes over 7000 rpm, 520+ ci |
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PRO 1 |
345cc |
Aluminum |
119cc |
2.30/1.88" |
Maximum Performance, Bracket Racing, Heads-Up & Super Classes over 7000 rpm, 520/540+ ci |
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PRO 1 CNC |
355cc |
Aluminum |
119cc |
2.30/1.88" |
Maximum Performance, Bracket Racing, Heads-Up & Super Classes over 7000 rpm, 525+ ci |
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Flow, Intake: |
(310) 369 cfm (325) 376 cfm (345) 397 cfm @.800 lift/28” |
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Flow, Exhaust: |
266 cfm @.800 lift/28” (Our valves, +10/15 cfm better) |
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Flow, Intake: |
(310) 369 cfm (325) 376 cfm (345) 397 cfm @.800 lift/28” |
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Flow, Exhaust: |
266 cfm @.800 lift/28” (Our valves, +10/15 cfm better) |
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Flow, Intake: |
(335) 400 cfm (355) 415 cfm @.800 lift/28” |
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Flow, Exhaust: |
303 cfm @.800 lift/28” |
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Flow, Intake: |
(310) 369 cfm (325) 376 cfm (345) 397 cfm @.800 lift/28” |
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Flow, Exhaust: |
266 cfm @.800 lift/28” (Our valves, +10/15 cfm better) |
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Flow, Intake: |
(335) 400 cfm (355) 415 cfm @.800 lift/28” |
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Flow, Exhaust: |
303 cfm @.800 lift/28” |
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Serious Racing Heads
$1400 to $1800 Each
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Specs |
Intake Port |
Material |
Chamber Volume |
Valve Int/Ext |
Engine and Performance Recommendations |
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Big Chief 14 degree Oval Port CNC |
440cc Rect Port |
Aluminum |
74 or 85cc |
up to 2.40/1.90" |
Maximum Pro Mod, Pro Street, Top Dragster& Top Sportsman Competition, excellent with alcohol & nitrous; Rectangular Port Design over 8000 rpm, over 500 ci |
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Big Chief Pro1 18 degree |
424cc Rect Port |
Aluminum |
95cc |
up to 2.40/1.90" |
Out- of-the-Box Performance; Maximum Competition, good with alcohol, or nitrous or super charged engine & light car, manual of clutchless transmission; Rectangular Port Design over 8000 rpm (titanium valves recommeneded), over 555 ci |
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Big Chief 14 degree |
395cc Rect Port |
Aluminum |
74 or 85cc |
up to 2.47/1.80" |
Maximum Pro Mod, Pro Street, Top Dragster & Top Sportsman Competition, excellent with alcohol and nitrous; Oval Port Design over 8000 rpm, over 500 ci |
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Big Chief II 11 degree |
497 Rect Port |
Aluminum |
56 or 71cc |
up to 2.47/1.80" |
Ultimate Big Chief head, Pro Stock style, Pro-Mod, Pro-Street, Big Cubic Inch or High RPM engines, up to 1" in lift cams; Oval Port Design over 8500 rpm, 500ci |
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