exhaust tubing diameter
Thread Starter
Junior Member
Joined: Jan 2002
Posts: 38
Likes: 0
From: Richmond VA
exhaust tubing diameter
How do i measure my exhaust for a new muffler?? i want to buy a cut out or a flowmaster 40 series. i have no idea how do take the correct measurements, and since i don't own a thirdgen (yet) i can't just ask what the diameter is. any help is appreciated greatly
Joined: Mar 2000
Posts: 43,187
Likes: 45
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Well, you've got me confused. If you don't have the car yet, why can you not ask, but can go measure? 
Exhaust size is expressed in outside diameter (OD) - generally. With a caliper, just go out and measure the width of the pipe wherever you're interested (cat inlet, muffler inlet, etc.).
If all you have is a tape measure, run it around the pipe and divide the measurement by pi (3.14159 or so). Don't try to use a steel tape for this, you need something that conforms tight to the pipe like a cloth tape. Or, use a string, mark the length around once, then lay out the string and measure it with ruler/tape.
Exhaust size is expressed in outside diameter (OD) - generally. With a caliper, just go out and measure the width of the pipe wherever you're interested (cat inlet, muffler inlet, etc.).
If all you have is a tape measure, run it around the pipe and divide the measurement by pi (3.14159 or so). Don't try to use a steel tape for this, you need something that conforms tight to the pipe like a cloth tape. Or, use a string, mark the length around once, then lay out the string and measure it with ruler/tape.
Thread
Thread Starter
Forum
Replies
Last Post
