NA LS3 427 Exhaust
Thread Starter
Joined: Aug 2009
Posts: 1,149
Likes: 168
From: Litchfield Park AZ
NA LS3 427 Exhaust NA 427 LS3 4th Gen F body Approaching 600 RWHP with ARH 1 7/8” headers into:
Speed engineering 3” true duals over the axle adding Borla XR1s
Or
ARH 3” to 4” Y, 4” cutout, reduce to 3” or 3.5” after cutout to a catback of choice
Or
3” to 4” Y, Single 4” Mufflex with Spintech crossflow dual 3” outlet (already have but understand the Spintech could cost nearly 20-30 RWHP)
This is a Trans Am so dual outlets at the bumper are a must for me.
Speed engineering 3” true duals over the axle adding Borla XR1s
Or
ARH 3” to 4” Y, 4” cutout, reduce to 3” or 3.5” after cutout to a catback of choice
Or
3” to 4” Y, Single 4” Mufflex with Spintech crossflow dual 3” outlet (already have but understand the Spintech could cost nearly 20-30 RWHP)
This is a Trans Am so dual outlets at the bumper are a must for me.
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Joined: Jun 2016
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From: Central Cal.
