Per Schroeder
Per Schroeder PowerDork
9/10/07 5:42 a.m.

Stock class autocross rules allow for exhaust system changes downstream of the catalytic converter. We bolted on Alta's 3-inch exhaust system last week. The sound is slightly more aggressive than stock, with only a touch of drone under load on the highway (up hills at certain RPM). The system weighs about 10 pounds less than stock. We'll be dynoing this …

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