The Jaguar E-Type is a handsome car—that sounds like an awesome project! The cost to replace a Jaguar E-Type exhaust system is going to depend on a lot of factors and could range anywhere from several hundred dollars to several thousand.
Ultimately, the cost is going to come down to what part(s) you need and what replacements you choose. As you’re looking for compatible parts, consider what your goal is, whether that’s to restore your Jaguar E-Type closer to its original condition, or whether you’re looking for high-quality materials.
If you’re looking for extra guidance on what kinds of parts to look for and how to find them, you can ask classic car experts in your area if you know any, or take to online Jaguar forums to find out what other enthusiasts recommend.