I have it removed on my car. It has never backfired. It does however make driving a bit more harsh. It keep the rpms from slamming down after a lift, ans smooths out shifts. Also when I go from zero to full throttle at low rpms my car has a single studder, that it didn't have with that valve.
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1979 928 85 Euro 2v motor,S4 Brakes and suspension, 1988 951 street legal track car(sold)
Neon SRT4 track car
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