Exhaust modification, y-pipe before the cat
#1
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Exhaust modification, y-pipe before the cat
Since late last year you have heard me banter about this piece shown below. This flex pipe was a temporary piece put in place to solve an issue involving the joint previously here, that had made a loud clanging noise.
Well, as of two weeks ago, this flex pipe is no more. I can tell because the vehicle no longer makes this pssst sound like a turbo when I accelerate and I have noticed a bit more kick in the pants, but still no records, why? I still am trying to figure it out myself, but will still be doing more testing, though I do have warmer weather now.
This will be the next to last exhaust modification before I go home to Florida, which may now well be within the next 2 months. The final modification will be a large muffler at the end to limit the amount of noise that my RX emits.
The objective here was to remove the restriction caused by the atrocious length of the flex pipe, about 8 inches and place the y-pipe in front so as to increase power gains. If you have heard of the concept of long tube headers, this isn't too far out of the way, except, we don't have the headers off of the manifold, just the pipes extending further out toward the cat, which is now significantly further back in its position than on a normal RX300.
Well, as of two weeks ago, this flex pipe is no more. I can tell because the vehicle no longer makes this pssst sound like a turbo when I accelerate and I have noticed a bit more kick in the pants, but still no records, why? I still am trying to figure it out myself, but will still be doing more testing, though I do have warmer weather now.
This will be the next to last exhaust modification before I go home to Florida, which may now well be within the next 2 months. The final modification will be a large muffler at the end to limit the amount of noise that my RX emits.
The objective here was to remove the restriction caused by the atrocious length of the flex pipe, about 8 inches and place the y-pipe in front so as to increase power gains. If you have heard of the concept of long tube headers, this isn't too far out of the way, except, we don't have the headers off of the manifold, just the pipes extending further out toward the cat, which is now significantly further back in its position than on a normal RX300.
#2
Super Moderator
Thread Starter
Our good friends at Mofles Cuajimalpa, same guys who is installed that big black muffler as a resonator underneath my RX, did the work once again. They wasted no time in fulfilling my wishes and proceeded to cut the flex pipe off.
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#10
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Now here is the cut section of pipe leading to both manifolds. What we plan to do here is weld the y-pipe we just cut out on to the front of the cat and then add piping from these areas here to the y-pipe itself.
#14
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And I take some time out to admire the beauty that is the twin pipe off the resonator to the muffler.
Although I have considered in my remaining time here to upgrade this a twin 2.5 from a twin 2.25 inch, I am going to leave it as is, 4.5 versus 5 inches total isn't much.
Although I have considered in my remaining time here to upgrade this a twin 2.5 from a twin 2.25 inch, I am going to leave it as is, 4.5 versus 5 inches total isn't much.