The first is trick flow "r" series and the second are dart irons. PLEASE keep in mind the added 45# from irons means NOTHING to me if the price is OVER $1000 less and I have already taken 150# off my front end. Thanks in advance!
Trick Flow R Heads, Assembled
$1,749.00
R-Series Aluminum Cylinder Heads for Small Block Ford
Made just for racing—the R-Series heads for 5.0L and 351W Ford feature the exclusive Twisted Wedge combustion chamber design. The 61cc chamber has the intake and exhaust valves rotated over the center of the cylinder bores. This unshrouds the intake valve and moves the spark plug closer to the center of the cylinder bore, increasing airflow and allowing for more complete combustion.
Complementing the combustion chambers are large 206cc intake ports, and exhaust ports that are raised .500" from stock. The heads are machined for 2.08" intake/1.60" exhaust valves. Combined, they provide 305 cfm intake and 222 cfm exhaust airflow at .720" of valve lift—right out the box (with recommended valve job and back cut intake valves). With a cartridge roll blend and polish job, those airflow figures increase to 325 cfm intake/254 cfm exhaust.
The R-Series heads have other race-ready features too: Additional material for porting, a .56" thick deck (available machined for Fel-Pro Loc-Wire head gaskets), intake port shaping compatible with Fel-Pro 1262 intake gaskets, stud mounts for rocker arms, spring pockets machined for 1.630" valve springs, and bronze valve guides already installed.
The R-Series heads are available as bare castings with valve seats and guides, or fully assembled with 2.08"/1.60" stainless steel valves, 1.560" valve springs, 10° locks with recess for lash caps, 10° retainers, and ductile iron intake and copper-bronze exhaust valve seats. 5/16" guideplates included with bare castings and assembled heads.
61cc 206cc 92cc 2.08" Intake, 1.60" Exhaust 1.560" Dual Springs
OR
Iron Eagle SBC 230cc Port Cylinder Heads
$661.00
Iron Eagle SBC 230cc Port Cylinder Heads
Small Block Chevy - 230cc Runner, available assembled or bare, 49cc, 64cc or 72cc chambers (please specify), angle or straight plug (Please scroll down for all available options)
All Iron Heads are DART's New Platinum Series cylinder heads!
The result of three decades of cylinder head development, Iron Eagle heads incorporate features that were previously available only in expensive aluminum cylinder heads. We designed Iron Eagle heads for street performance, bracket racing, oval track competition, and high-performance marine use. We offer five different intake ports - 165cc, 180cc, 200cc, 215cc, and 230cc that cover virtually every engine application. Dart Iron Eagle heads have standard features you don’t get in other factory and aftermarket cast-iron cylinder heads. Long-wearing bronze valve guides (except S/S), multi-angle intake valve seats, and hardened and radiused exhaust seats are standard.
DART Part# 10710040P thru 10821143P
Material: Superior iron alloy
DART Combustion Chambers: 49cc, 64cc & 72cc
DART Intake Valve Dia: 2.08”
DART Intake Port volume: 230cc
DART intake Port Dim: 2.180” x 1.210”
Int Port Location: Stock
DART Recommended Intake Gasket: Fel-Pro#’s #1206 (can Not use an OEM type)
DART Exh Valve Dia.: 1.600”
Exh Port volume: 75cc
Exhaust Port Dim: 1.375” x 1.325”
Exh Port Location: Stock Location & Bolt Pattern
DART Recommended Exhaust Gasket: Fel Pro # 1405
Flow, Intake: 308cfm @ .700” lift / 28”
Flow, Exhaust: 207cfm @ .700” lift / 28”
Head Bolts: Stock bolts may be used, we suggest ARP # 134-3601
Head Studs: ARP# 134-4001 or 234-4301 (12pt)
Manifold: Dart Alum Dual Plane (opening 1.100”x 2.00”) 5.50” tall or most aftermarket
Milling: Angle mill .125” safely / .200” = 49cc 1.5, Min. 58cc = .060” (.0065” = 1cc) Flat Mill° (carefully)
Pistons: Most 23°aftermarket pistons.Stock (Stock length = 7.800”)
Push Rod length: Stock thru +.100” Should always measure (Stock length = 7.800”)
Push Rod Guide Plate: Must only use Comp Cam # 4808 (flat)
Retainers: Steel 1.250” = ( 7° ) 1.437” = (10°)
Spark Plug: Angle or straight, .460” reach, tapered seat, Autolite AR133
Spring Cups: None
Spring Pockets: 1.550” OD (.030” deeper max)
Spring Options:
1.437D = 130# @ 1.800” / .620” max Comp 987
1.550D = 195# @ 1.900” / .690” max Comp 954
Valve Angles: Stock
Trick Flow R Heads, Assembled
$1,749.00
R-Series Aluminum Cylinder Heads for Small Block Ford
Made just for racing—the R-Series heads for 5.0L and 351W Ford feature the exclusive Twisted Wedge combustion chamber design. The 61cc chamber has the intake and exhaust valves rotated over the center of the cylinder bores. This unshrouds the intake valve and moves the spark plug closer to the center of the cylinder bore, increasing airflow and allowing for more complete combustion.
Complementing the combustion chambers are large 206cc intake ports, and exhaust ports that are raised .500" from stock. The heads are machined for 2.08" intake/1.60" exhaust valves. Combined, they provide 305 cfm intake and 222 cfm exhaust airflow at .720" of valve lift—right out the box (with recommended valve job and back cut intake valves). With a cartridge roll blend and polish job, those airflow figures increase to 325 cfm intake/254 cfm exhaust.
The R-Series heads have other race-ready features too: Additional material for porting, a .56" thick deck (available machined for Fel-Pro Loc-Wire head gaskets), intake port shaping compatible with Fel-Pro 1262 intake gaskets, stud mounts for rocker arms, spring pockets machined for 1.630" valve springs, and bronze valve guides already installed.
The R-Series heads are available as bare castings with valve seats and guides, or fully assembled with 2.08"/1.60" stainless steel valves, 1.560" valve springs, 10° locks with recess for lash caps, 10° retainers, and ductile iron intake and copper-bronze exhaust valve seats. 5/16" guideplates included with bare castings and assembled heads.
61cc 206cc 92cc 2.08" Intake, 1.60" Exhaust 1.560" Dual Springs
OR
Iron Eagle SBC 230cc Port Cylinder Heads
$661.00
Iron Eagle SBC 230cc Port Cylinder Heads
Small Block Chevy - 230cc Runner, available assembled or bare, 49cc, 64cc or 72cc chambers (please specify), angle or straight plug (Please scroll down for all available options)
All Iron Heads are DART's New Platinum Series cylinder heads!
The result of three decades of cylinder head development, Iron Eagle heads incorporate features that were previously available only in expensive aluminum cylinder heads. We designed Iron Eagle heads for street performance, bracket racing, oval track competition, and high-performance marine use. We offer five different intake ports - 165cc, 180cc, 200cc, 215cc, and 230cc that cover virtually every engine application. Dart Iron Eagle heads have standard features you don’t get in other factory and aftermarket cast-iron cylinder heads. Long-wearing bronze valve guides (except S/S), multi-angle intake valve seats, and hardened and radiused exhaust seats are standard.
DART Part# 10710040P thru 10821143P
Material: Superior iron alloy
DART Combustion Chambers: 49cc, 64cc & 72cc
DART Intake Valve Dia: 2.08”
DART Intake Port volume: 230cc
DART intake Port Dim: 2.180” x 1.210”
Int Port Location: Stock
DART Recommended Intake Gasket: Fel-Pro#’s #1206 (can Not use an OEM type)
DART Exh Valve Dia.: 1.600”
Exh Port volume: 75cc
Exhaust Port Dim: 1.375” x 1.325”
Exh Port Location: Stock Location & Bolt Pattern
DART Recommended Exhaust Gasket: Fel Pro # 1405
Flow, Intake: 308cfm @ .700” lift / 28”
Flow, Exhaust: 207cfm @ .700” lift / 28”
Head Bolts: Stock bolts may be used, we suggest ARP # 134-3601
Head Studs: ARP# 134-4001 or 234-4301 (12pt)
Manifold: Dart Alum Dual Plane (opening 1.100”x 2.00”) 5.50” tall or most aftermarket
Milling: Angle mill .125” safely / .200” = 49cc 1.5, Min. 58cc = .060” (.0065” = 1cc) Flat Mill° (carefully)
Pistons: Most 23°aftermarket pistons.Stock (Stock length = 7.800”)
Push Rod length: Stock thru +.100” Should always measure (Stock length = 7.800”)
Push Rod Guide Plate: Must only use Comp Cam # 4808 (flat)
Retainers: Steel 1.250” = ( 7° ) 1.437” = (10°)
Spark Plug: Angle or straight, .460” reach, tapered seat, Autolite AR133
Spring Cups: None
Spring Pockets: 1.550” OD (.030” deeper max)
Spring Options:
1.437D = 130# @ 1.800” / .620” max Comp 987
1.550D = 195# @ 1.900” / .690” max Comp 954
Valve Angles: Stock
