Custom 2.5 X piped Exhaust to stock mufflers
#1
Custom 2.5 X piped Exhaust to stock mufflers
I recently just did full a 2.5 inch x pipes to stock mufflers. I deleted secondary cats and resonator. I must say, it picks up better and sounds marvelous. Virtually no drone. It sounds just slightly louder then stock when cruising but when accelerating, it roars just enough to where my mark levinson can still be heard. And yes, you can hear the engine note too. I basically used Lou's design but did not added rear resonators, secondary cats, and did not had to modify the stock mufflers.
Sound clips to follow by later this week
Sound clips to follow by later this week
#3
^^ I definitely hear you. Thats why i kept the stock mufflers. It will probably pass the emission test but would fail visual check. I know a smog guy who tends to not look underneath for the cats. Thats how i pass with my previous is350 with no secondary cats.
#7
I did the same on my car, i feel improvement on acceleration and hp probably, not dyno. I know cause cause after racing my friends isf, i was faster than him on highway 😉😃, but on mine i custom double burnt tips at each end, and removed the stock tips... sounds amazing. And really quiet in idle...
This is a picture when i was installing my spoiler, do car is dirty, lol....
This is a picture when i was installing my spoiler, do car is dirty, lol....
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#9
#12
Lexus Champion
iTrader: (9)
I really don't want to throw cold water on this thread, but your installer used Crush Bends which will cause some restriction. I had an exhaust similar to yours before I installed my PPE Dual Mode system, and all my bends were Mandrel. It's the superior choice because it keeps the ID the same throughout the exhaust system.
I also had two inlets running into the stock muffler.
https://www.clublexus.com/forums/is-...n-exhaust.html
Other than the Crush Bends, the workmanship looks very good.
Lou
I also had two inlets running into the stock muffler.
https://www.clublexus.com/forums/is-...n-exhaust.html
Other than the Crush Bends, the workmanship looks very good.
Lou
#13
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I really don't want to throw cold water on this thread, but your installer used Crush Bends which will cause some restriction. I had an exhaust similar to yours before I installed my PPE Dual Mode system, and all my bends were Mandrel. It's the superior choice because it keeps the ID the same throughout the exhaust system.
I also had two inlets running into the stock muffler.
https://www.clublexus.com/forums/is-...n-exhaust.html
Other than the Crush Bends, the workmanship looks very good.
Lou
I also had two inlets running into the stock muffler.
https://www.clublexus.com/forums/is-...n-exhaust.html
Other than the Crush Bends, the workmanship looks very good.
Lou
#14
Lexus Champion
iTrader: (2)
I really don't want to throw cold water on this thread, but your installer used Crush Bends which will cause some restriction. I had an exhaust similar to yours before I installed my PPE Dual Mode system, and all my bends were Mandrel. It's the superior choice because it keeps the ID the same throughout the exhaust system.
I also had two inlets running into the stock muffler.
Other than the Crush Bends, the workmanship looks very good.
Lou
I also had two inlets running into the stock muffler.
Other than the Crush Bends, the workmanship looks very good.
Lou
Last edited by ISF_GG; 03-18-15 at 10:03 PM.