Banks TorqueTubes® System 1991-1999 Jeep Wrangler 4.0L, 1991-1998 Cherokee
Please read through the following instructions thoroughly before starting your installation. If you have any questions please visit our Support Page.
General Installation Practices
1. For ease of installation of your Banks Revolver Manifold, familiarize yourself with the procedure by reading the entire manual before starting work.
2. Throughout this manual, the left side of the vehicle refers to the driver’s side, and the right side to the passenger’s side.
3. Disconnect the ground cable from the battery before beginning work. If there are two batteries, disconnect both.
4. Route and tie wires and hoses a minimum of 6 inches away from exhaust heat, moving parts and sharp edges. Clearance of 8 inches or more is recommended where possible.
5. When raising the vehicle, support it on properly weight-rated safety stands, ramps or a commercial hoist. Follow the manufacturer’s safety precautions. Take care to balance the vehicle to prevent it from slipping or falling. When using ramps, be sure the front wheels are centered squarely on the topsides; put the transmission in park; set the hand brake; and place blocks behind the rear wheels.
Caution! Do not use floor jacks to support the vehicle while working under it. Do not raise the vehicle onto concrete blocks, masonry or any other item not intended specifically for this use.
6. During installation, keep your work area and components clean to avoid possible dirt entry into the engine.
7. For proper performance from your Banks components and to prevent engine damage, it is essential that your engine’s fuel system be capable of delivering fuel at the factory’s specification. We have often found vehicles with inadequate low-pressure side fuel delivery that isn’t apparent until performance modifications are made.
• 1⁄4” and 3⁄8” drive ratchets with inch and metric sockets and 3⁄8” drive extension
• Inch and metric combination or open-end wrenches
• Standard and Phillips head screwdrivers
• Standard and needle-nose pliers
• Pocket or X-Acto knife
• Clean shop towels or rags
• Inch-pound and foot-pound torque wrenches
Highly recommended tools and supplies:
• Compressed air source and hoses
• Penetrating oil or light lubricant spray
• 9⁄16” swivel socket
• Floor jack and jack stands
• Fuel-line quick disconnect tool
Bill of Materials
Exhaust Manifold Installation
NOTE: Do not wrap manifold. Wrapping the Revolver Manifold with exhaust wrap or thermo tape will void the Revolver Manifold warranty. Exhaust wrapping can cause the manifold to crack and rust. The Revolver Manifold has been designed to operate efficiently and protect the engine components without the use of wrapping.
1. Remove the air inlet hose from the throttle body and move it aside. On some models, the airbox assembly may need to be removed in order to relocate the air inlet hose.
2. On the intake manifold assembly, remove the throttle cable, transmission pressure cable, and cruise control cable (if equipped) located inside the engine compartment.
3. isconnect any electrical connectors and vacuum lines on the intake manifold and throttle body. Be sure to label the lines to ensure the correct replacement.
4. Remove the fuel line. Some models may require a special tool. If necessary refer to the service manual for more info.
5. Disconnect and separate O2 sensor and coupling from mounting bracket as needed.
6. Loosen the power steering set screws located on the pump. Loosen the belt tensioner and remove the power steering belt. Next, disconnect the power-steering pump and bracket from the intake manifold.
7. Remove the hardware from the head pipe and disconnect the head pipe from the exhaust manifold.
8. Loosen intake/exhaust bolts 3, 6, and 7, but do NOT remove.
These bolts act as supports for the exhaust manifold. Remove all remaining intake/exhaust manifold bolts and set aside hardware for re-assembly (a 9⁄16” swivel socket may save time
9. Remove the intake manifold from the engine block. Remove the remaining bolts (bolts 3, 6, and 7) and remove the exhaust manifold.
10. Inspect the exhaust and intake mounting surfaces of the cylinder head and remove any rust or carbon that might prevent the TorqueTube or intake manifold from sealing. Be careful debris does not enter the engine ports.
11. Install the supplied gasket onto the cylinder head dowels. Place a small amount of anti-seize on the threads of each of the eleven (11) factory intake and exhaust bolts.
12. Install Banks Revolver Manifold onto the cylinder head and support with loosely installed bolts in locations 3, 6, and 7.
13. Install bolts 1, 2, 4, and 5 about three turns into the engine block. Guide the intake manifold onto the cylinder head dowels. Loosely install all remaining intake/exhaust factory bolts. Be sure Banks Revolver Manifold and intake manifold seats flush as bolts are tightened.
14. Torque all exhaust and intake manifold bolts to 25 ft-lbs in the sequence shown. Insert the supplied conical gasket onto the head pipe. Re-connect head pipe to the Revolver Manifold with the supplied 3⁄8” hardware.
15. If head pipe was removed, tighten and torque head pipe hardware to 35-ft-lbs.
16. Reinstall driver-side engine mount using factory hardware.
17. Reinstall the power steering pump and mount the bracket to the intake manifold. Reinstall the belt and adjust the belt tensioner to the vehicle specification.
18. Reconnect all vacuum and electrical connections on the intake manifold. Reinstall the throttle cable, transmission pressure line cable, and cruise control (if applicable.)
19. Reinstallation the fuel line. Reconnect the exhaust O2 sensor.
20. Reinstall the air inlet hose onto the throttle body. Reinstall the air cleaner assembly if removed.
21. Reconnect the battery. Start the engine and listen for exhaust leaks. Check the fuel line for any leaks. Once normal operating temperatures have been reached, drive the vehicle and listen for any leaks or rattles. Correct as necessary.
CARB EO LABEL
Please use the following CARB-approved emissions label and EO label location guidelines. We generally use the radiator shroud location.