273 Mopar Intakes
Edelbrock #LD-4B
* Aluminum Dual-Plane High-Rise {For 1966 '273' and later}
* Carburetor Mounting Height ..... 4.90"
* Port Size ............................... 1.05" x 1.95"
* Square-Bore Opening
* Split-Divider
Generally regarded as the 'best overall' Intake Manifold for the 273.
----------------------------------------------------------------------------------
Edelbrock #D-4B
* Aluminum Dual-Plane High-Rise {1965 '273'}
* Carburetor Mounting Height ...... 4.90"
* Port Size ................................ 1.05" x 1.95"
* Square-Bore Opening
* Split-Divider
Same as above, just for the early 1965 '273'
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Offenhauser 360* 'Equa-Flow' ~ #5700
* Aluminum Single-Plane High-Rise {1966 '273' and later}
* Carburetor Mounting Height ..... 5.20"
* Port Size ............................... 1.07" x 2.00"
* Square-Bore Opening
* Split-Divider
Generally regarded as the best 'Track Performance' Intake, due to the extended high-rise Carburetor-base.
The 'Equa-Flow' Manifold has the appearance of a Dual-Plane on the outside,
but the manifold is designed with a wide-open plenum, with a full-length
center-divider, with a small-notched out section.
The 360* Design, and tall Manifold provides for optimal Top-End performance.
----------------------------------------------------------------------------------
Offenhauser 360* 'Equa-Flow' ~ #5699
* Aluminum Single-Plane High-Rise {1965 '273'}
* Carburetor Mounting Height ..... 5.20"
* Port Size ............................... 1.07" x 2.00"
* Square-Bore Opening
* Split-Divider
Same as above, just for the early 1965 '273'.
-----------------------------------------------------------------------------------
Weiand 'Action+Plus' ~ #8007
* Aluminum Dual-Plane High-Rise {1966 '273' and later}
* Carburetor Mounting Height ..... 5.41"
* Port Size ............................... 1.00" x 1.96"
* Spread-Bore Opening
* Split-Divider
An excellent 'Street Performance' Intake. The 180* Design, with
short-runners plumbed into long-runners, provides for good Torque
at the top of the Bottom-End and thru Mid-Range, and Power in Mid-Range
and into early Top-End.
----------------------------------------------------------------------------------
Edelbrock 'Performer' ~ #2176
* Aluminum Dual-Plane High-Rise {1966 '273' and later}
* Carburetor Mounting Height ..... 4.63"
* Port Size ................................ 0.97" x 1.95"
* Spread-Bore Opening
* Split-Divider
A solid 'Street Performance' Intake with an emphasis on Torque throughout
the full-range, from 'Idle' to 5500 RPM's.
The 180* Design provides for a crisp Throttle-Response.
-------------------------------------------------------------------------------------
Offenhauser 360* 'Dual-Port' ~ #6020-DP
* Aluminum Dual-Plane High-Rise {1966 '273' and later}
* Carburetor Mounting Height ..... 5.20"
* Port Size {Primary} ................. 1.10" Wide x 0.75" Tall {Lower-Port}
* Port Size {Secondary}.............. 1.10" Wide x 1.18" Tall {Upper-Port}
* Square-Bore Opening
* 4-Hole Bore
The 'Gimmick Intake' with a 'Dual-Port' runner design.
The Primaries feed the lower runner-ports which are smaller and have
a higher temperature.
The Secondaries feed the upper runner-ports which are larger and are
a cooler temperature.
Generally good for Street-Driving where mileage and Low-End performance
was required. Decent Mid-Range performance for Power.
The #6021-DP Manifold is a Spread-Bore Opening design.
-----------------------------------------------------------------------------
Offenhauser 360* 'Dual-Port' ~ #6022-DP
* Aluminum Dual-Plane High-Rise {1965 '273'}
* Carburetor Mounting Height ..... 5.20"
* Port Size {Primary} ................ 1.10" Wide x 0.75" Tall {Lower-Port}
* Port Size {Secondary} .............1.10" Wide x 1.18" Tall {Upper-Port}
* Square Bore Opening
* 4-Hole Bore
Same as above description.
The #6023-DP Manifold is a Spread-Bore Opening design.
-----------------------------------------------------------------------------
Edelbrock 'Streetmaster' 318
* Aluminum Single-Plane Medium-Rise
* Carburetor Mounting Height ..... 4.35"
* Port Size ............................... 0.95" x 1.95"
* Square Bore Opening
* Octagon-shaped inner-plenum area
A Single-Plane Design with narrow-runners for air-velocity.
An open-plenum with an 'octagon-shaped' taper to direct the
air-flow.
Another adequate Street Performer for a Mild Performance engine.
------------------------------------------------------------------------
Weiand ~ #7510
* Aluminum Single-Plane Low-Rise
* Carburetor Mounting Height .... 3.90"
* Port Size ............................... 0.88" x 1.90"
* Square-Bore
* Open-Plenum
A 'Low-Profile' Intake, with a small-port and short-runner design, much like an early Edelbrock Torker.
Good for Mild Street Performance 273/318 engines, with an emphasis on Low-End Torque and moderate Mid-Range Power.
--------------------------------------------------------------------------------------
Edelebrock 'SP2P'-318 ~ #3275
* Aluminum Dual-Plane Low-Rise {1966 '273' and later}
* Carburetor Mounting Height .... 4.00"
* Port Size ............................... 0.75" x 1.80"
* Spread-Bore Opening
* Split-Divider
Designed for improved fuel-mileage and low-emission efficiency. Small
runner-ports with narrow passages increase air-velocity, which helps increase Low-End Torque.
It is 'not' regarded as a Performance Intake Manifold.
Edelbrock #LD-4B
* Aluminum Dual-Plane High-Rise {For 1966 '273' and later}
* Carburetor Mounting Height ..... 4.90"
* Port Size ............................... 1.05" x 1.95"
* Square-Bore Opening
* Split-Divider
Generally regarded as the 'best overall' Intake Manifold for the 273.
----------------------------------------------------------------------------------
Edelbrock #D-4B
* Aluminum Dual-Plane High-Rise {1965 '273'}
* Carburetor Mounting Height ...... 4.90"
* Port Size ................................ 1.05" x 1.95"
* Square-Bore Opening
* Split-Divider
Same as above, just for the early 1965 '273'
---------------------------------------------------------------------------------
Offenhauser 360* 'Equa-Flow' ~ #5700
* Aluminum Single-Plane High-Rise {1966 '273' and later}
* Carburetor Mounting Height ..... 5.20"
* Port Size ............................... 1.07" x 2.00"
* Square-Bore Opening
* Split-Divider
Generally regarded as the best 'Track Performance' Intake, due to the extended high-rise Carburetor-base.
The 'Equa-Flow' Manifold has the appearance of a Dual-Plane on the outside,
but the manifold is designed with a wide-open plenum, with a full-length
center-divider, with a small-notched out section.
The 360* Design, and tall Manifold provides for optimal Top-End performance.
----------------------------------------------------------------------------------
Offenhauser 360* 'Equa-Flow' ~ #5699
* Aluminum Single-Plane High-Rise {1965 '273'}
* Carburetor Mounting Height ..... 5.20"
* Port Size ............................... 1.07" x 2.00"
* Square-Bore Opening
* Split-Divider
Same as above, just for the early 1965 '273'.
-----------------------------------------------------------------------------------
Weiand 'Action+Plus' ~ #8007
* Aluminum Dual-Plane High-Rise {1966 '273' and later}
* Carburetor Mounting Height ..... 5.41"
* Port Size ............................... 1.00" x 1.96"
* Spread-Bore Opening
* Split-Divider
An excellent 'Street Performance' Intake. The 180* Design, with
short-runners plumbed into long-runners, provides for good Torque
at the top of the Bottom-End and thru Mid-Range, and Power in Mid-Range
and into early Top-End.
----------------------------------------------------------------------------------
Edelbrock 'Performer' ~ #2176
* Aluminum Dual-Plane High-Rise {1966 '273' and later}
* Carburetor Mounting Height ..... 4.63"
* Port Size ................................ 0.97" x 1.95"
* Spread-Bore Opening
* Split-Divider
A solid 'Street Performance' Intake with an emphasis on Torque throughout
the full-range, from 'Idle' to 5500 RPM's.
The 180* Design provides for a crisp Throttle-Response.
-------------------------------------------------------------------------------------
Offenhauser 360* 'Dual-Port' ~ #6020-DP
* Aluminum Dual-Plane High-Rise {1966 '273' and later}
* Carburetor Mounting Height ..... 5.20"
* Port Size {Primary} ................. 1.10" Wide x 0.75" Tall {Lower-Port}
* Port Size {Secondary}.............. 1.10" Wide x 1.18" Tall {Upper-Port}
* Square-Bore Opening
* 4-Hole Bore
The 'Gimmick Intake' with a 'Dual-Port' runner design.
The Primaries feed the lower runner-ports which are smaller and have
a higher temperature.
The Secondaries feed the upper runner-ports which are larger and are
a cooler temperature.
Generally good for Street-Driving where mileage and Low-End performance
was required. Decent Mid-Range performance for Power.
The #6021-DP Manifold is a Spread-Bore Opening design.
-----------------------------------------------------------------------------
Offenhauser 360* 'Dual-Port' ~ #6022-DP
* Aluminum Dual-Plane High-Rise {1965 '273'}
* Carburetor Mounting Height ..... 5.20"
* Port Size {Primary} ................ 1.10" Wide x 0.75" Tall {Lower-Port}
* Port Size {Secondary} .............1.10" Wide x 1.18" Tall {Upper-Port}
* Square Bore Opening
* 4-Hole Bore
Same as above description.
The #6023-DP Manifold is a Spread-Bore Opening design.
-----------------------------------------------------------------------------
Edelbrock 'Streetmaster' 318
* Aluminum Single-Plane Medium-Rise
* Carburetor Mounting Height ..... 4.35"
* Port Size ............................... 0.95" x 1.95"
* Square Bore Opening
* Octagon-shaped inner-plenum area
A Single-Plane Design with narrow-runners for air-velocity.
An open-plenum with an 'octagon-shaped' taper to direct the
air-flow.
Another adequate Street Performer for a Mild Performance engine.
------------------------------------------------------------------------
Weiand ~ #7510
* Aluminum Single-Plane Low-Rise
* Carburetor Mounting Height .... 3.90"
* Port Size ............................... 0.88" x 1.90"
* Square-Bore
* Open-Plenum
A 'Low-Profile' Intake, with a small-port and short-runner design, much like an early Edelbrock Torker.
Good for Mild Street Performance 273/318 engines, with an emphasis on Low-End Torque and moderate Mid-Range Power.
--------------------------------------------------------------------------------------
Edelebrock 'SP2P'-318 ~ #3275
* Aluminum Dual-Plane Low-Rise {1966 '273' and later}
* Carburetor Mounting Height .... 4.00"
* Port Size ............................... 0.75" x 1.80"
* Spread-Bore Opening
* Split-Divider
Designed for improved fuel-mileage and low-emission efficiency. Small
runner-ports with narrow passages increase air-velocity, which helps increase Low-End Torque.
It is 'not' regarded as a Performance Intake Manifold.
