5.7 Exhaust Y pipe Question

[louied]

Team,

What is the diameter of the Y-Pipe going to the manifolds? 2 1/4, 2 1/2,or 3"

I am picking up a set of split formed flanges for my k5 , but it's not around me to measure.


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Thanks.

 

[ChrisPerry]

My old truck (80 K5) had 2.25" from the manifolds to the Y-pipe.Then 3" to the CAT. Not sure if it was stock or aftermarket.

 

[83ChevyK5Blazer]

mine had 21/4 to the manifolds

 

[4X4HIGH]

They are different depending on the year. My 89 was factory 2 1/2" Y-pipe to a 3" single exhaust down the driverside exiting out the side behind the rear wheel.