I have a 1999 y87 with magnaflow cat back exaughst. How much hp gain do you think I'm getting with it?
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magnaflow catback?
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Do some free or inexpensive air intake modes like these: http://home.comcast.net/~grayman99/Air-intake.htm
and you should be seeing about 10-15 hp from that catback rather than 5 to 10. basicaly even just $5 in intake mods will get you some HP and better throttle response.
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by ssms5411So my truck is finally getting some work done, after 17 years, Oil pressure sensor went out and it’s located under the lower intake manifold. Have to...3 weeks ago
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