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Discussion Starter #1
Anyone ever use or know of anyone to use the WPN R y pipe?


I installed a "J pipe" on my Acura TL when I had it, and it made a little change in exhaust note, and actually increased my mpg by 1. I was very impressed with the results. There was a ton of dyno results that proved it.

I was hoping this may have the same results for the sienna. I'm mostly just interested in increasing my mpgs.
 

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Please keep us updated! What is your plan with the gaskets? Are the holes on the bung slightly oversized (not tight to bolt)? Cost and link?
 

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Discussion Starter #4 (Edited)
Please keep us updated! What is your plan with the gaskets? Are the holes on the bung slightly oversized (not tight to bolt)? Cost and link?
Its installed. I had my local shop do it. He said it was a tight fit, but it fit pretty well. The quality seemed really nice. I purchased 1998-2016 Sienna API exhaust gaskets for replacements. It did come with bolt hardware and exhaust doughnut gasket, but you'll need the API gasket. Pipe was only $228 and came in less than a week. As i mentioned i hope to get similar results like I did with my TL. I report back after I get some miles on it.

Weapon R 11-17 Toyota Sienna 3.5L 2-Piece Racing Y-Pipe (Off Road Use ONLY), 953-203-104 – RCA Garage
 

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I personally would delete the y pipe and go for true dual exhaust through an x pipe it will scavenge better and will have substantially better performance. I’m currently am doing this on my 15 as well as komotec headers and full cat delete
 
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