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Originally Posted by RockyMtnRay
Welcome Denny. If all the OEM parts are there, it shouldn't be a big job to replace the K&N. I'd recommend a MAF sensor cleaning while the dealer is replacing the parts. After the ECU adjusts to the change, you'll find you have noticeably more mid range (~3000 RPM) torque though perhaps a tiny bit less at the top end (~5000 RPM) and the truck will be a heckuva lot quieter and more civil. ![Smile](https://www.trailmanorowners.com/forum/images/smilies/smile.gif)
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Thanks a bunch for your help Ray. My 'yota dealer did the reverse operation and the patient has recovered!
![Big Grin](https://www.trailmanorowners.com/forum/images/smilies/biggrin.gif)
The MAF unit was cleaned and tested. Good to go. All the OEM parts were there. Labor and new filter just busted the $100 threshold.
Re., the roar. Since the Tundra was new to me, I assumed that roaring sound was normal. Now I know what normal sounds like; a great improvement for sure. Also, when the K&N was in use, and I did a hard acceleration, the truck would lurch forward (large increase of accel) at around 45-50 mph, w/o a change of pedal input. More like an afterburner. Now the time-rate-of-change of velocity is predictable, and a welcome change!
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And if you want to get some really serious towing torque out of your truck's drivetrain, just do the same mods I did to mine. The JBA headers (7% mid range torque gain), Gibson muffler (3% mid range torque gain), and regeared axles (10% across the board rear wheel torque gain) have collectively given me a solid 20% increase in rear wheel torque over stock. ........snip......
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Since I will be more a flat land camper, I think I'll wait to see how the truck works out with my next (still waiting to purchase) trailer. I do not plan to tow a trailer in excess of 5500 lbs.
Again, thanks for the heads up
![Smile](https://www.trailmanorowners.com/forum/images/smilies/smile.gif)
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Denny