Note: When ordering the IO-540 with an Airflow Performance throttle body, you will need to provide some components that are not included in our Firewall-Forward kit. Specifically, the push-pull cables, VA-182 throttle/mixture bracket and fuel hoses will likely need to be replaced with parts that fit the AFP option, and the Van's filtered air box may require some modification .
Note that a Thunderbolt associate will contact you to confirm your color preferences.
Custom Thunderbolt Engine Options
The following options are available from Lycoming for Thunderbolt engines. Selection of one or more of these options will result in the addition of a $1000 engine customization fee (charged once per engine), plus the individual cost of each custom item chosen.
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