Edelbrock 5426 Installation Instructions

Catalog #5426, 7526

Rev. 1/06 - RS/mc

©2006 Edelbrock Corporation

Brochure #63-0271

Page 1 of 2

C-

26

AND RPM AIR-GAP DUAL QUAD VORTEC INTAKE MANIFOLDS

For 262-400 c.i.d. Chevrolet V8 with Vortec Cylinder Heads 

Catalog #5426 & 7526

INSTALLATION INSTRUCTIONS

PLEASE study these instructions carefully before beginning this installation.  Most installations can be accomplished with common tools and

procedures.  However, you should be familiar with and comfortable working on your vehicle.  If you do not feel comfortable performing this

installation, it is recommended to have the installation completed by a qualified mechanic.  If you have any questions, please call our 

Technical

Hotline at: 1-800-416-8628, 7:00 am - 5:00 pm, Pacific Standard Time, Monday through Friday or e-mail us at edelbrock@edelbrock.com..

IMPORTANT NOTE:  Proper installation is the responsibility of the installer.

Improper installation may result in poor performance and engine or vehicle damage.

PLEASE complete and mail your warranty card.  Be sure to write the model number of this product in the "Part #____" space.  THANK YOU.

DESCRIPTION: The Edelbrock Vortec Dual Quad and RPM Air-Gap Vortec Dual Quad intake manifolds have been designed for 283-400 c.i.d. Small

Block Chevrolet V8 engines with Vortec style heads.  They combine two small four-barrel carburetors with a dual plane manifold layout to achieve

the best balance of drivability, great looks, and outstanding performance for muscle car, street rod and marine applications.  #7526 features an

Air-Gap design, separating the runners from the engine valley for a cooler, denser air charge.  It stands 1-5/8” taller than the 5426 and it’s larger

runners offer performance improvements in the 1500-6500 RPM range.  Edelbrock has developed special air filters for these manifolds.  To give

your engine the ultimate custom look, the polished aluminum Elite Series oval air cleaner #4235 is suggested.  Chrome oval air cleaner #1235 or

two #1209 (6" round) Pro-Flo air cleaners are also available.  Please note Bracket section below for your particular installation.

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ACCESSORIES & INSTALLATION ITEMS: Major recommendations are listed below.  See our catalog for details.  To order a catalog, call

(800) FUN-TEAM, or visit www.edelbrock.com.

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EGR SYSTEMS: These intake manifolds will not accept stock EGR (Exhaust Gas Recirculation) equipment.  EGR systems are used on most

1972 and later model vehicles.  Check local laws for requirements.

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THROTTLE & ACCESSORY BRACKETS:  The throttle and kickdown bracket on some vehicles may require modification to fit.  These manifolds

will not accept 1968 and earlier alternator bracket assemblies and have no provision for ignition coil mounting.  Use progressive linkage kit

#7094 to connect the carburetors together (See “Carburetor Recommendations”).

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CARBURETOR RECOMMENDATIONS: Use two manual choke carbs (Two 1404’s or two 1804’s), or one manual and one electric choke (1403

& 1404, or 1803 & 1804, if electric choke is desired).  Note that the Thunder Series carburetors listed under manifold #7526 are calibrated

specifically for the 7526 manifold, and in most cases, will not require additional tuning.  For manifold 5426, see “Prep and Tuning for Power”

for additional tuning information.

5426:

7526:

CARBURETOR

CHOKE TYPE

PARTS REQUIRED FOR INSTALLATION

Performer #1403 (500 cfm)

Electric

#7094 Dual Quad Throttle Kit, #8088 Dual Quad fuel line kit

Performer #1404 (500 cfm)

Manual

#7094 Dual Quad Throttle Kit, #8088 Dual Quad fuel line kit

NOTES: Carburetors each require #8008 or #8024 stud, washer and nut kit.  Determine proper length based on gasket thickness and your

accessory mounting requirements.  If two manual choke Performer Series Carburetors are used and electric choke is desired later on, they can be

converted to electric choke using Electric Choke Kit #1478.  Use electric choke on the rear carburetor ONLY.  Manual choke Thunder Series

carburetors CAN NOT be converted to manual choke.  If electric choke is desired with Thunder Series carburetors, a manual choke carburetor

should be used in the front and an electric choke carburetor should be used at the rear.

CARBURETOR

CHOKE TYPE

PARTS REQUIRED FOR INSTALLATION

Thunder Series #1803 (500 cfm)

Electric

#7094 Dual Quad Throttle Kit, #8088 Dual Quad fuel line kit

Thunder Series #1804 (500 cfm)

Manual

#7094 Dual Quad Throttle Kit, #8088 Dual Quad fuel line kit