i was planing on putting on headers and a true dual exhaust with no cats and galsspacks. but ive heard that not enough backpressure can actually lower your horse power or torque. is this true
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99\' W68 Firebird<br />SLP Ram air kit,Whisper Air Lid, k&n, 8mm Taylor Wires, Bridgestone Potenzas RE950, BMR Red LCAs, Pacesetter Headers and 3\"in catalytic converter with 2.75\" Flowmaster Cat-back<br /><br /> <a href=\"http://www.cardomain.com/memberpage/501008\" target=\"_blank\">http://www.cardomain.com/memberpage/501008</a>
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