Dual Exhaust?
#2
Lexus Test Driver
It is a Y shaped configuration.
#4
Several days ago there was a post here (I can't find it, but I think it was from someone who worked at a Lexus dealer in Florida) to the effect that the exhaust headers from each side of the V6 were combined and then split, so more like an X configuration.
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#5
not dual exhaust
Originally Posted by cooney
Several days ago there was a post here (I can't find it, but I think it was from someone who worked at a Lexus dealer in Florida) to the effect that the exhaust headers from each side of the V6 were combined and then split, so more like an X configuration.
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#6
Lexus Test Driver
IS250 and 350 both are duals....
because they have separate headers and O2 sensors etc which then join about midship for a common muffler then divide out to individual mufflers and tailpipes. The "X" type is a good description. Both cars are ULEVII compliant and best fuel efficiency in the Lexus lineup. All around state of the art engineering under the hood with excellent power to weight ratio.
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#9
Lexus Test Driver
I agree. Looking at the design, it is geared too much towards keeping the engine quiet and constrictive. It must be robbing the car of substantial horsepower (around 8-9 whp (11 - 12 HP at the crank) or so).
Originally Posted by NotFatBoy
that exhaust has to go! too much constriction!
Last edited by 05RollaXRS; 10-29-05 at 08:33 PM.
#11
Originally Posted by Maximus330
Anyone know how much the HK muffler will be? Also, any idea on the eta?
Lex
#13
Lexus Test Driver
Join Date: Sep 2005
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If I had to guess I'd say that 05RollaXRS is probably pretty close, 8-9 rwhp on the same dyno. I doubt you would feel it, but it's still fun to do. And besides, you might help the exhaust note.