A fender apron will prevent belt buckle scratches and also provides a good surface for res
The exhaust system is responsible for evacuating the spent gases and other byproducts of combustion from the engine. If you consider the intake system, be it carburetion or fuel injection, as the "inhale," then the exhaust system is the "exhale" when it comes to engine breathing. And easier breathing equates to more power and a better running engine.
Changing the exhaust manifold or installing tubular exhaust headers on a big-block engine may, at first, seem to be a daunting task. Really, it's not that hard if you do things in a logical order, have the right tools, and take your time. In this article I'll show you how to install both of these exhaust solutions on a '67 427 coupe.
Corvette Central was our source for the high-quality foreign reproduction exhaust manifolds and the superb custom-welded tubular headers along with the gaskets, studs, and other requisite hardware.
Before we go on to the installation procedures, a few words about safety: An integral part of this installation involves getting under your Corvette to disconnect the exhaust system from the manifolds and then reconnect the exhaust system to the new manifolds or headers. Never get under your Corvette (or any other vehicle) unless it is properly supported with jackstands. The hydraulic trolley jack is meant to elevate the vehicle, not support it once it is elevated. Nothing can ruin your day as quickly as having your Corvette come crashing down on you while you're underneath it!
Regardless of whether you're replacing manifolds or installing headers, the installation procedures for both are similar, and both are shown here.
|Difficulty Index - 2 Wrenches|
|Anyone’s Project: no tools required||1 Wrench|
|Beginner: basic tools||2 Wrenches|
|Experienced: special tools||3 Wrenches|
|Accomplished: special tools and outside help||4 Wrenches|
|Professionals Only: send this work out||5 Wrenches|
Here is the reproduction exhaust manifold and the tubular headers (for the driver-side) fr
What You Need
Hydraulic trolley jack
Spark plug boot pliers
7/16-, 1/2-, 9/16-inch sockets and combination wrenches
Mat or creeper
I like using a magnetic tray while working to hold nuts, bolts, and other pieces during th
After elevating your Corvette and supporting it securely with jackstands, go underneath it
Here's the stock passenger-side manifold with the broken stud. Refurbishing this manifold
Use spark plug boot pliers to remove the plug wires without damaging them.
A 9/16 socket will remove the manifold mounting bolt that also secures the dipstick tube.
Take off the plug wire shielding with a 7/16 socket (if so equipped), remove the seven rem
Once the manifold is off, use a razor scraper to remove any remaining gasket debris left o
The studs are supplied with the reproduction manifolds, and they have to be threaded into
Locking pliers can be used to tighten the studs into the manifolds.
One side of the manifold/header gasket is flat, and the other side is foil-coated and dimp
Blackened bolts with lock washers like the one at the upper left are used for securing the
Position the gasket on the manifold, insert a bolt, and thread it into the head. Insert an
If you're installing headers instead of the manifolds, the procedure is basically the same
Back underneath the car, insert a sleeve and donut (if required) in each exhaust pipe and
Here's a look at the passenger side of our big-block with the headers installed. Now that