Does the IS250 headers work for the IS350?
01-19-10, 10:04 PM
#2
I just about 4 hours ago picked my car up from PPE. they are test fitting a new set of ceramic coated headers.....Still a little work left tomorrow. But PM me sometime in the evening and Ill let you know what the Dyno says after it is all done.....
As far as product and the people behind the product - I can only say kind things. Very Very VERY knowledgeable about cars and exhaust. a company i would give my business too hands down.
As far as product and the people behind the product - I can only say kind things. Very Very VERY knowledgeable about cars and exhaust. a company i would give my business too hands down.
01-19-10, 10:34 PM
#5
from what i am told they will.... No warning lights popped on and it sounds good. we are installing high flow cats next week... so its a bit loud right now but will soften a bit when they are finished.
01-20-10, 04:24 AM
#6
100% of all headers sold for the 250 or 350 are illegal in all 50 US states as they all either eliminate or replace a set of cats. (can't speak to legality in other countries)
That doesn't mean you won't sneak by if you get a lazy inspector in some states, but you won't be legal.
Anyway, headers designed for the 250 will physically fit a 350, but that doesn't mean it's a good idea and you might well lose performance as a result. Header design is a pretty detailed science and randomly slapping a set designed for one engine onto one with a significantly larger displacement isn't necessarily a great plan.
Not to mention AFAIK the only 250 headers in production are Megan (with reported poor build quality and no dyno evidence I've seen of results even on a 250), and Jun-TW which are insanely expensive again with not much independent dyno evidence to back them up.
That doesn't mean you won't sneak by if you get a lazy inspector in some states, but you won't be legal.
Anyway, headers designed for the 250 will physically fit a 350, but that doesn't mean it's a good idea and you might well lose performance as a result. Header design is a pretty detailed science and randomly slapping a set designed for one engine onto one with a significantly larger displacement isn't necessarily a great plan.
Not to mention AFAIK the only 250 headers in production are Megan (with reported poor build quality and no dyno evidence I've seen of results even on a 250), and Jun-TW which are insanely expensive again with not much independent dyno evidence to back them up.
01-20-10, 05:36 PM
#7
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Good stuff thanks a lot bro
... I figured it wouldn't work well since 350 are stronger motors.
... I figured it wouldn't work well since 350 are stronger motors.100% of all headers sold for the 250 or 350 are illegal in all 50 US states as they all either eliminate or replace a set of cats. (can't speak to legality in other countries)
That doesn't mean you won't sneak by if you get a lazy inspector in some states, but you won't be legal.
Anyway, headers designed for the 250 will physically fit a 350, but that doesn't mean it's a good idea and you might well lose performance as a result. Header design is a pretty detailed science and randomly slapping a set designed for one engine onto one with a significantly larger displacement isn't necessarily a great plan.
Not to mention AFAIK the only 250 headers in production are Megan (with reported poor build quality and no dyno evidence I've seen of results even on a 250), and Jun-TW which are insanely expensive again with not much independent dyno evidence to back them up.
That doesn't mean you won't sneak by if you get a lazy inspector in some states, but you won't be legal.
Anyway, headers designed for the 250 will physically fit a 350, but that doesn't mean it's a good idea and you might well lose performance as a result. Header design is a pretty detailed science and randomly slapping a set designed for one engine onto one with a significantly larger displacement isn't necessarily a great plan.
Not to mention AFAIK the only 250 headers in production are Megan (with reported poor build quality and no dyno evidence I've seen of results even on a 250), and Jun-TW which are insanely expensive again with not much independent dyno evidence to back them up.
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