In this video we install Doug Thorley 4-2-1 headers on our 2004 V8 4th gen 4runner. Towards the end of the movie, we do a sound comparison and dyno it. We make at least 37.4 ft-lbs more torque!!! We plan to tow our track miata with this 4runner - so every bit more torque helps. This vehicle has been completely transformed!
We did all of the common bolt-ons at the same time:
Doug Thorley headers installation
Y-Pipe Installation
O2 simulator installation
Gibson catback exhaust installation
Volant air intake
Parts:
Doug Thorley Headers (off road use only): [ Ссылка ]
Y-Pipe: [ Ссылка ]
O2 simulator (off road use only): [ Ссылка ]
Gibson cat-back exhaust:
[ Ссылка ]
New Fastenal engine mount hardware (class 10.9):
[ Ссылка ]
[ Ссылка ]
NGK spark plugs:
[ Ссылка ]
Rubber splash guards/rain guards:
[ Ссылка ]
Milwaukee Cordless Ratchet:
[ Ссылка ]
Milwaukee 1/2" Impact:
[ Ссылка ]
BudBuilt Skid Plate (AL, bare metal):
[ Ссылка ]
Headlights (custom FX-R Bixenon projector retrofit on OEM Toyota headlights):
[ Ссылка ]
Music by Kurtis Tyler (check out his Spotify!): [ Ссылка ]
![](https://s2.save4k.ru/pic/EGhN95tw6U0/maxresdefault.jpg)