97 Civic HX Dual Exahst

[jake_irwin_87]

Hey i have a 97 hx civic, i had just one can on it before and it was prety quick, but i dualed it and it kinda seems slower now and it just doesn't seem much better, i heared that duals will actually slow your car down. i was wonder what you guys think about this. i have an intake on it and duals and thats about it. oh and i was wondering about a header and cat combo off ebay. in the pic it shows the cat butplate has 3 holes and is like a triangle shape... well how do i get that to fit on my civic if the butplates are oval and only have 2 holes? thanks for all your time and help.

[bluevp00]

Originally Posted by jake_irwin_87

Hey i have a 97 hx civic, i had just one can on it before and it was prety quick, but i dualed it and it kinda seems slower now and it just doesn't seem much better, i heared that duals will actually slow your car down. i was wonder what you guys think about this.

A dual exhaust is completely useless on an inline engine. Only V-type engines benefit from dual exhaust because they have 2 seperate exhaust manifolds on either side of the engine. A seperate exhaust pipe on either side of the engine bay (1 for each row of cylinders) cuts backpressure down by allowing the exhaust gases from each side of the engine to escape at the same rate. Inline engines only have 1 exhaust manifold, and therefore dont need (nor can any inline engine have) a true dual exhaust system.

What you probably have on your car isn't a real dual exhaust system, but rather it's a straight pipe from the engine thats split into 2 seperate pipes at the end (sort of like a "Y" shape). Believe it or not, this configuration actually creates more backpressure by forcing the exhaust gases to go down 2 seperate holes rather than one big hole.

Hope this answers your question. And Welcome to AF.

[jake_irwin_87]

thanks, do you have any information on the cat question though?