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Reformed Ricer
07 STI, 07 STI, 10 Forester, 03 WRX
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4,575 Posts
Discussion Starter · #1 ·
what is the stock exhaust tube size on my 1999 subaru impreza rs 2.5....please help....i thought it to be 2.5 inches but i'm not certain
 

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2017 WRB BRZ w/PP
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1,739 Posts
I wanna say its like 1 7/8". I'm not positive tho. No way its 2.5", my Borla CB is 2.25"...which is the max recommended for NA.
 

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2017 STi
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9,572 Posts
Shit I have no clue, I'd say 2.5 also. You heading down the waterfront on Monday for the car show?
 
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