Corvette Tunnel Plate

Tunnel Plate Installation Instructions

Tools Needed

1. Jack and jack stands.
2. Ramps
3. Wheel chalks
4. 22 mm wrench
5. 13 mm socket
6. 8 mm socket
7. Penetrating oil, Liquid Wrench, WD40

Step 1

1. Jack up your Corvette
2. Place jack stands in the front and rear of the vehicle.
3. Check jack stands for a good seat to insure the vehicle will not move.

Step 2

1. From under the vehicle, spray a small amount of penetrating oil on the Tri bolt Manifold/Header flange, exhaust mounting bracket bolts and the catback flange bolts.
2. Remove the O2 sensors.  Be sure to mark them for drivers side and passenger side for reinstalling.
3. Remove the 6 manifold/header bolts.
4. Remove the 4 bolts that connect the cat back.
5. Loosen the exhaust bracket bolts, do not fully remove.
6. Remove the exhaust hanger bolts.
7. Remove the exhaust bracket bolts.
8. The mid section of your exhaust should be now be fully disconnected from the car.

Step 3

1. You should now have a clear shot at the stock tunnel plate. 
2. Remove the 36 bolts, leaving 1 on each side approximately in the middle of the stock plate for support.
3. Take note of your O2 sensors, you will need to feed them threw the hole in your stock plate when you remove it.
4. Remove the final two bolts from the stock plate and remove the plate.

Step 4

1. Position your CCA Tunnel Plate for installation and feed your O2 sensors threw the appropriate hole.
2. Insert 1 bolt roughly in the middle of the plate on each side to secure plate. Do not tighten.
3. Insert remaining 34 bolts and hand tighten until plate is flush with the bottom of the tunnel.
4. Tighten all tunnel plate bolts to 86 inch/pounds of torque, or 1/2 turn past snug.  (Do not over tighten, you will strip these bolts.) In this case, extra tight does not add to product performance.

Step 5

1. Reverse above instructions to reinstall exhaust.
2. Take note of your marked O2 sensors and be sure to install them on the correct side.

Notes of interest

1. The CCA plate was designed with two holes for cars that have headers, relocated cats and relocated O2 sensors.
2. If you car has had previous exhaust work, take a look at your exhaust brackets, now may be a great time to get some good quality replacements.

Disclaimer

These instructions are provided for information purposes only. Do not attempt installation of any CCA part if you are not a qualified mechanic.

For proper jacking instructions for your Corvette, please consult your owners manual.

Custom Corvette Accessories accepts no responsibility of damage to your vehicle during installation of our parts and accessories.
 
Custom Corvette Accessories accepts no responsibility for damage to your vehicle while using our installed parts during operation of your vehicle.

Custom Corvette Accessories suggests that you contract a qualified mechanic for installation of all parts and accessories.