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How often do i need a smog test?
by Answerbag Staff on May 20th, 2011
| 1 person likes this
Which states do not have vehicle emissions tests?
by Answerbag Staff on May 19th, 2011
| 1 person likes this
What are EMF emissions?
by Answerbag Staff on May 18th, 2011
| 1 person likes this
Other than the CAT, what should be checked for a "System Below Threshold Error", P0420 code number on a 2005 Cobalt?
by Fr Joe on September 6th, 2011
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My 17 yr old son took my car and had a shop remove the catalytic converter and put in a straight pipe. Can I make the shop put it back on?
by btundra on July 6th, 2011
| 3 people like this
You're reading Do those big, noisy mufflers I see on all the Civics actually improve performance?
Comments
Right on; first improve the engine, then add the new muffler to assist the mods.
by Santaanacanyon on September 6th, 2003
Perfect answer! Exhaust velocity vs. back pressure....
by 8 Jan 2004-10 Dec 2009 on July 7th, 2004
Excellent answer
by Andy Is Wicked Married to Penal Colony on August 27th, 2004
Yep, yep. For the question, this is the perfect answer. For Civics, the engine needs mods before exhaust is useful. But for a say... Mitsu Lancer Evo, a muffler system can definitely increase TQ and HP off a dyno.
by DenverYay on July 5th, 2006