There are sts systems making HUGE power now. The front mount will make more power and have a massive bling factor. The rear mount has less clutter in the engine bay. The cost of both systems will be a wash. A typical front mount will make about 900 hp out of the box, a rear mount needs massive upgrades to make the same power, so in the end they cost about the same. A rear mount is also louder due to not having a muffler. You also lose dual exhaust unless you rig up a fake one or do dual rear mounts.
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Twin Turbo LS1 '71 Chevelle
1000 hp 93 octane street car
6 speed
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