| CYLINDER HEAD MANUFACTURER | SPECIFICATION SHEET RECOMMENDATION | DENSO IRIDIUM POWER EQUIVALENT |
| AFR AIR FLOW RESEARCH | ||
225cc LS1 Mongoose Strip Head 180cc SBC Street Head 180cc LT1 Street Head 195cc SBC Street Head 195cc LT4 Street Head 305/315/325/335/345/357cc Magnum BBC 165/185cc SBF Outlaw Street Heads 205/224cc SBF Outlaw Race Heads 165/185cc SBF Street/Strip Outlaw Heads | AC 41-974 Platinum AC 41-974 Platinum AC FR3LS AC FR3LS AC FR3LS AC FR3LS CH C59C, Autolite 3932 Autolite 3924 Autolite 3922 Autolite 3924 | IT16 IT16 IK16 IK16 IK16 IK16 IK27 IK16 IK22 IK16 |
| BRODIX | ||
BBC, Big Brodie series C.A.R.B. legal Heads | NGK B9ES Ch14YC or AL3924 | IW24 gas, IW27 alcohol IK16 |
| DART | ||
Big Chief, ALL Big M – Head FORD 20 Degree Iron Eagle, 308cc & 345 cc BBC
Iron Eagle, 23 Degree, 180, 200, 215, 230cc SBC Iron Eagle S/S
Little Chief, 11degree SBC head Pro 1, 23 Degree SBC & BBC all cc’s Race Series, 220cc SBC Head Race Series, 18 Degree BBC head | .750” reach, gasket, Ch C57C/C57YC .750” reach, gasket, Ch C59C /C59YC Street RC12YC .750” reach, gasket, Ch C59C/C59YC .750” reach, gasket, Ch C59C /C59YC Street RC12YC Angle or straight, .460 reach, tapered seat, Ch V59C / V59YC Straight, .460” reach tapered seat Ch RV12YC / AC R44TS Ch C57C / C57YC Ch C59C / C59YC Ch C59C / C59YC Ch C57C / C57YC | IK31, IK01-31 IK27, Street app IK16 IK27 IK27, Street app IK16 ITF27 ITF16
IK31, IK01-31 IK27, IK01-27 IK27, IK01-27 IK31, IK01-31 |
| EDELBROCK | ||
All except flathead | ||
| FORD RACING PERFORMANCE PARTS | ||
GT-40 “Turbo-Swirl” Alum. Cyl. Heads GT-40X “Turbo-Swirl” Alum Cyl. Heads “Sportsman” Short Track Cast Iron Cyl. Heads “Z” Aluminum Head Robert Yates Alum. Cyl. Heads “High Port” Yates Head High Port Head for all out Performance Super Cobra Jet Cylinder Heads | IK20 IK20 ITF20 IQ16 IW SERIES IW SERIES IW SERIES IK20 | |
| PRO TOPLINE | ||
Iron Lightning, Pro Lightning Other | Ch V55C, V57C CH C55C, C57C | ITF24 IK31 |
| TRICK FLOW | ||
Track Heat Alum. Cyl, heads for SB Ford 18 Degree Alum. Heads for SB Chevy 23 Degree Alum. Heads for SB Chevy R-Series cyl. Head for BB Chevy | AC-FR3LS, Autolite- 3924, NGK 7373 Ch C57C, AL 3932, NGK R5671A-10 AC-FR3LS, Autolite- 324, NGK FR5, Ch -RC Autolite-3922 | IK16 IK31 IK16, IK20 IK22 |
| WORLD | ||
Windsor Jr Windsor Jr. Lite Windsor Sr. Lite Roush 200 Cast Iron Torquer 440, Aluminum Sportsman II Lite S/R S/R Torquer Sportsman II MOTOWN 205/220 MOTOWN 220 Lite MERLIN II OVAL & RECT. PORT 320cc & 345cc MERLIN | ITF20, ITF22 IK16, IK20 IK16, IK20 ITF20, ITF22 IK24, IK31 IK16, IK20 ITF16, ITF20 ITF16, ITF20 ITF16, ITF20 ITF16, ITF20 IK16, IK20 ITF16, ITF20 IK16, IK20 | |
