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): www.urdusa.com/thy-564y-ls-c-...
Y-Pipe: www.urdusa.com/89253-doug-tho...
O2 simulator (off road use only): www.urdusa.com/urd-rear-senso...
Gibson cat-back exhaust:
www.summitracing.com/parts/GI...
New Fastenal engine mount hardware (class 10.9):
www.fastenal.com/products/det...
www.fastenal.com/products/det...
NGK spark plugs:
amzn.to/2Sq4zFr
Rubber splash guards/rain guards:
amzn.to/2SmVgWQ
Milwaukee Cordless Ratchet:
amzn.to/2HSHh9a
Milwaukee 1/2" Impact:
amzn.to/3lgzIYu
BudBuilt Skid Plate (AL, bare metal):
budbuilt.com/Front-Skid-Plate...
Headlights (custom FX-R Bixenon projector retrofit on OEM Toyota headlights):
lightwerkz.net/
Music by Kurtis Tyler (check out his Spotify!): open.spotify.com/artist/5nVCW...
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