Doug Thorley Headers long tube headers + y-pipe hardware.

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As previously announced, on 30 March 2024 we strapped down the YotaWerx 2008MY 2WD 4th gen 4Runner 4.7L to the dyno to document numbers for the already highly popular YotaWerx 4.7L VVTI “Blackhawk” calibration, and to make any improvements on the spot if necessary.

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This was part of a larger project in partnership with Doug Thorley Headers and Burtman Industries, with the goal of developing a calibration for the Doug Thorley long tube headers & y-pipe hardware combination, a very common upgrade path for 4.7L owners.

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Following the dyno session for the 4.7L Blackhawk calibration with the OEM exhaust manifolds, installation of the Doug Thorley long tube headers and y-pipe began. Upon completion of installation and confirmation of proper fit and function, the YotaWerx 4.7L 4Runner returned to the dyno on 09 April 2024.

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The attached graphs review the results showing the difference between the stock calibration and "Blackhawk-LTH", both with the headers installed, as well as the dramatic effect of going from stock calibration with stock manifolds to the YotaWerx tune with the headers and y-pipe.