TRD/ cat back exhaust

Ok so it took me 4 hours to install but that was a lot of time spent digging out my tools and figuring out how everything goes together. Also it is really a 2 man job but I managed it by myself.

I used 2 rhino ramps, 2 floor jacks on the frame for safety, 4 wheel chocks on the front wheels, 1 motorcycle jack to lift the new exhaust into place. You will need standard and deep 14mm sockets, and an assortment of extensions. There is one heat shield just behind the cat on the left side that will need to be removed, which is secured by two 12mm head bolts.

The studs and springs are reused behind the cat on the left. On the right, behind the cats, is an elbow that is about 8" long. It does not need to be removed. All other connections will use the new hardware provided. The thick seal in the hardware kit is for the connection between the center pipe and elbow. The larger diameter, thinner, seal is for the center pipe to rear pipe connection.

I do suggest washing both pipes with soap and water before installing to avoid the massive cloud of white smoke that @jclaffee mentioned. It is real and I got some really funny looks from people in traffic.

First impressions:
Wow. Its got a deep and low growl. No, its not a v8, but I find the sound quite pleasing. Obviously it's loud when the engine is under load accelerating or climbing a grade. Drone is minimal to me. Cruising the canyons at around 45mph at 1500rpm, the drone is hardly noticeable. It gets louder as you climb to 2000rpm. Then past 2000rpm I can imagine it getting a little old. I also had it on the highway at about 75 and felt the drone was minimal while cruising between 1500 and 2000rpm. Its there, but my wife and I were able to have a conversation without raising our voices and my hyper and anxious puppy was able to fall asleep. Keep in mind that this is all entirely subjective so YMMV.

Am I keeping it? Hell yes. Will be posting my stock exhaust for sale shortly for those that got the TRD from the port and want something quieter.

Standard parts, left. TRD, right. Elbow that I didn't need to remove, top center. Note that on stock exhaust and the MagnaFlow, the inlet pipes are joined before entering the muffler. On the TRD the pipes enter the muffler separately, which I expect would result in better flow. That is a win for the TRD in my book.
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Put a few more miles on over the weekend and the stock exhaust is going back on next week. If anyone wants to buy a TRD exhaust with ~300 miles on it and can pick up in SW Colorado, it's yours for 50% of what I paid for it. PM me.

It's not that it sounds bad, it just doesn't fit what I want from this vehicle. I've had a lot of loud, proud vehicles over the years and I've decided that I'm cool with this one being more stealthy. And my wife says she agrees :)

(Mods please delete this if inappopriate)
 
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We've had the TRD cat-back and NYTOP axle-back on our car and I can objectively say the NYTOP is almost stock sounding. The TRD is much louder and deeper relative to the stock and NYTOP. It's still far from loud. You can't even hear it in certain conditions (light throttle on the interstate). I thought it was made from mild steel when we first got it, but I got confirmation from Lexus that it's some form of stainless steel. We've had it on the car through the Indiana winter (and salt) and at least 20 car washes. It's looks like the day we put it on. Speaking of the day we put it on, I did it by myself while it was on an AWD dyno (Fathouse Performance). No lift. Just slid under the car. We wanted to see if there was in improvement, but we ended up losing power with each run. The cars computer was not happy and kept pulling timing. We never figured out how to overcome that, so no power figures until we do.

The NYTOP is insanely light (titanium) and looks incredible. It's tucked away for maximum ground clearance.

We ordered a MagnaFlow 3 months ago, to do a side-by-side comparison, but they still haven't delivered yet. Maybe they forgot about Dre. o_O

Stock (2.50" dia) =
TRD (2.75" dia) = Aggressive but still not loud (cat-back)
NYTOP (3.00" dia) = Stealth sound, but looks boss and ground clearance galore (axle-back)

The short is far from short, but it's for anyone who is like me and really gets into my hobbies and researches the hell out of everything I can:
 

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