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Does anyone know how much (ballpark) a shop would gut pre-cats for??


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Originally posted by getlucky151:
Does anyone know how much (ballpark) a shop would gut pre-cats for??



No shop will touch them since it is illegel unless you personally know the mechanic and hes willing to do it.


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I do know the mechanic.... ....so how much.?


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Do not remove the main cat, if anything replace with a highflow. It has been dynoed and proven that removing the main cat and placing in a test pipe have gotten negative gains to our cars. But hey thats jsut what a dyno says!!


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Originally posted by getlucky151:
I do know the mechanic.... ....so how much.?




If he's never done it before, figure about 3 hours of labor. This assumes he's got a lift & proper tools, and I'm being generous.

Seriously, if you've got the cash for headers, go for it! Gutted precats will essentially gain you nothing unless they're falling apart inside.



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is there any advantage of putting a custom made true dual exhaust on the 2.5L?


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please type that in the search!! That topic has been discussed many times!!


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im just going to go with the headers. my friend has a 91 accord and headers gave him a real good power gain. once i put my headers in and my 3.0 uim im going for a chip. than after that ill be saving for a 3L.


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Originally posted by cvkillacontour98:
im just going to go with the headers. my friend has a 91 accord and headers gave him a real good power gain. once i put my headers in and my 3.0 uim im going for a chip. than after that ill be saving for a 3L.




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Let me toss my (contrarian).02 in here. If you simply punch the precat material out, as someone here posted that there's not much gain, and I believe it. However, if you take a close look at the internal construction of the precats AND address the internal impediments to flow there are significant gains.

My precats were welded internally & externally, ported and then punched. Although I did not do any back to back (also added other parts at the time of install)there were significant gains and my total outlay was $50. As I recall, Terry Haines quoted gains of approx. 10HP.

The main problem is the stock Y pipe collector. This would be the first item I'd address. IMO, $600 for a set of headers is outrageous. MSDS HP claims on the website are obviously overstated. Everyone I know who has them, has complained about premature rusting. Now I know they offer an optional better coating, but it's an additional cost.

So there you have it, $50 vs. $600+, although you get a Y pipe too. Labour is the same either way.

You decide.


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