Edelbrock 4742 User manual

Pro-Flo Header

1994-1997 Honda Civic Del Sol

Catalog PNs 6642, 6742, 4742

Please study these instructions carefully before installing your new Pro-Flo Header.

They provide general guidelines to be studied and understood before you remove your stock

system. Failure to follow these instructions may void your warranty. If you have any questions or

problems, please contact our Technical Hotline at : 1-800-416-8628 from 7 am –5 pm,

Monday through Friday, Pacific Standard Time.

DESCRIPTION: Edelbrock Pro-Flo header components are designed to improve the exhaust

efficiency of the Civic del Sol 1.6L (B16A) engine. A performance gain can be expected with the

installation of the system. This system requires no welding for installation and retains all stock

emissions equipment.

Suggested tools needed for installation: This vehicle has some metric fasteners.

•3/8” ratchet socket set with extensions and a good assortment of metric sockets

•Combination wrenches (metric)

•Universal 12mm and 14mm swivel sockets

•Jackstands, screwdrivers, pliers, crescent wrench, etc.

•Liquid penetrant (GM #1052627 or equivalent); anti-seize compound (GM #5613695 or

equivalent)

SPECIAL NOTICE: This Edelbrock part has received an Executive Order number (E.O. #) from

the California Air Resources Board (C.A.R.B.) making it legal for street use on pollution-controlled

motor vehicles in all 50 states. To assist you with emissions equipment certification, we have

included a silver fan shroud decal to help testing personnel verify that this part is a legal

replacement part on the vehicle for which it is cataloged. The adhesive-backed decal should be

affixed to your fan shroud next to the existing emission and engine specification decal. Do not

cover your original equipment specification decal with the Edelbrock fan shroud decal.

WARNING: The use of “Thermal Wrap” or any aftermarket coating process will void the

warranty on your Pro-Flo header. Those products can cause excessive heat and moisture build up

resulting in corrosion and early failure of the system.

DISASSEMBLY:

1. Disconnect battery negative cable from battery.

2. Raise vehicle and support with jackstand.

3. The use of penetrating oil when removing and the use of anti-seize compound when

installing nuts and bolts will prevent the possibility of broken or stripped nuts and bolts.

4. Make sure converter is cool.

PARTS LIST

DISASSEMBLY (Continued)

5. Remove O2 sensor (if applicable) being careful not to destroy or rupture the unit.

Warning: Do not clean this unit in any cleaning solvents and do not rupture

wire.

6. Remove the two nuts from hanger bracket. Remove the two bolts and springs at the

catalytic converter. Then unbolt the three bolts at the mid-section of manifold and

remove lower portion of manifold (B-section).

7. Remove the bolt that is attached to the engine block in the lower section of manifold.

Remove bolts from manifold at cylinder head and pull manifold out from top side.

Note: Save all factory nuts, bolts and springs to be used during re-assembly.

ASSEMBLY

1. Install (a section) of header assembly from top side with gasket and 9 hardened

washers (supplied in kit), using factory bolts/nuts as applicable.

2. Install secondary section (B section) to (A section) top half using the three 10mm. Bolts

and lock washers with the two crush ring gaskets (all supplied in kit). Use anti-seize on

threads. (The two crush rings should be installed with the seam or split down towards

B-section).

3. With donut in place, connect header to catalytic converter using stock hardware as

before.

4. Install O2 sensor “if equipped”. Use anti-seize on threads of sensor and torque to 30 ft.

lbs.

Part Numbers Qty. PN Description

125-9180 Pro-Flo Header (A Section)

6642 125-9191 Pro-Flo Header (B Section)

122-6852 Installation Kit

125-9182 Pro-Flo Header (A Section)

6742 125-9192 Pro-Flo Header (B Section)

122-6852 Installation Kit

125-9178 Pro-Flo Header (A Section)

4742 125-9193 Pro-Flo Header (B Section)

122-6852 Installation Kit

Edelbrock Corporation

2700 California Street

Torrance, CA 90503

Tech Line: (800) 416-8628

E-Mail: [email protected]

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