Originally Posted by crocus
That's what is nice about having an "old" truck!
Removed the very restrictive factory exhaust, and put on a stainless 4 inch straight pipe. Jumped the fuel mileage considerably, and now I can hear my turbo whistling. That is the coolest sound!
Best mod I have done to date.
I'll bet the sound most definitely improved... I would love to hear it!
Have you done any research into how a "less restrictive exhaust" like a 4" pipe, affects both torque and HP?
Usually, the results are surprisingly counterproductive on normally aspirated engines, but does the turbo get around that?
On normally aspirated engines, a "cat-back" dual exhaust system can increase both HP and Torque, but if they do, they usually have reduced pipe diameters.
Jim & Kathy
2012 Crusader 290RLT TE, TrailAir flex pin: 2012 Toyota Tundra 5.7 SR5 Dbl cab 4X2 Tow, 4.30 gears, RideRite air, TRD cold-air induction & dual exhaust: Reese 16K Slider: TST tpms
Miles towed to date: 18,950 Nights camped 192