i took off the back half of the exhaust on my 1994 chevy silverado 350 V8 right at the clamp after the catalitic converter and i have heard that without the muffler on there the motor wont have enough bak pressure to run properly, but it hasnt given me any noticeable problems yet, but i have also heard that by leaving the cat on the motor WILL have enough back pressure. idk which theory to believe. can you help me??
thanks.