hehe 
1 7/8 Headers
Its recommended that you go with a 1 -3/4" header. 1 7/8" headers are for big strokers.
Although there are a couple people here running 1 7/8" headers on 346's. Not enough testing or data to warrant if they will lose power in low and midrange. Use the search and see what you find.
Although there are a couple people here running 1 7/8" headers on 346's. Not enough testing or data to warrant if they will lose power in low and midrange. Use the search and see what you find.
TECH Enthusiast
Joined: Jun 2003
Posts: 720
Likes: 0
From: So Cal
Correct me if im wrong but if you put to large a header on a smaller engine (i.e. the 346) wont you lose a lot of low end torque? 1 7/8 are normally used for FI or No2 applications from what ive seen. 
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Teching In
Joined: Nov 2003
Posts: 10
Likes: 0
From: Melbourne Australia
Originally Posted by Rice Burner
Anyone have them? What are everyones thoughts on them? How much additional gain over 1 3/4"?
People might laugh at the idea of try-y's on the LS1 but even high rpm,high output 160 hp/litre motorcycles have gone that way now,maybe a better torque curve is achieved overall.
Cheers Glenn
Just to muddy the waters a little 
I have 1 7/8's mid length Whisper headers on my Stock Internals car.
With the big stall and high rpms that this car runs, the big tubes don't seem to hurt it.
I have 1 7/8's mid length Whisper headers on my Stock Internals car.
With the big stall and high rpms that this car runs, the big tubes don't seem to hurt it.
