1996 GMC C3500 Exhaust

1996 GMC C3500
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RON_SMITH
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  • 1 POST
1996 GMC C3500

This just a question in general. How long does a straight pipe (no muffler or catalytic converter) need to be to prevent damage to the valves? and without a muffler or catalytic converter what percent of HP the the engine increase?
Oct 25, 2010 at 5:53 PM
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DR LOOT
  • ✓ASE Certified Mechanic
  • 2,311 POSTS
  • ASE Certified Mechanic
you will not hurt nothing running straight pipe, horsepower will increase by 25%
Oct 31, 2010 at 2:20 PM
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