




Dundon Motorsports stands behind our products with a 30-day love it guarantee. We are confident in the quality and performance of their upgrades, but if for any reason they don't meet your standards or help you push your performance on track, you can send them back within 30 days.
Some products are built locally and made to order. Typical lead time for welded components (mufflers, headers) is about 7 business days after purchase. In rare cases timelines may change—we’ll notify you by phone.
Includes:
Cobb Accessport - $1495
Dundon ProTune - $795
Dundon Motorsports is happy to provide the Cobb Accessport for the 981 GT4/Spyder. We're Cobb Pro Tuners and have developed a great tune for the Dundon GT4/Spyder Race Headers.
Gains Over Stock including GT4/Spyder Race Headers and Dundon Pro Tune:3600 RPM: +50 wtq +32whp5000 RPM: +55 wtq, +52whp5800 RPM: +24 wtq, +26whp6500 RPM: +30 wtq, +36whp7500 RPM: +30 wtq, +43whp377.1whp on our dyno works out to 438.8 BHP
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