Is V35A-FTS Adjustable? A Guide to ECU Tuning and Piggyback Systems — Toyota V35A-FTS Tuning Toyota V35A-FTS tuning If you’ve been eyeing the Toyota V35A-FTS engine for your next build, project car, or power upgrade, you’re not alone. This 3.4L twin-turbocharged V6 engine has made waves in performance circles since it debuted in vehicles like