right now i have a 2 3/4 i.o and 2 3/4 o.d on my muffler if i go with a 3 in what will that do for me? quiter or louder and any thing on mpg?
thinkin bout doin dual tail pipes on my truck what does that do for my mpg and sound for my 97 chevy 1500?
What engine do you have in your truck? If it's a v8 a 3in in and out single pipe would be good, or a 3in single in and 2.5 or 2.75 dual out. MPG improvements will be minor at best. Dont use true dual exhaust on these trucks as it will give you no back pressure which these motors need and will actually make you slower. If you have the 4.3 then a single 2.75 in and out or dual 2.5 out. Flowmaster 40's are nice and loud, Dynomax super turbo is a little quieter but still gives some good sound.
Yeah, oversizing your exhaust can actually rob power from you. You won't see any gains in fuel mileage from exhaust. Personally, I like the Magna-Flow cat-back systems over Flowmasters. Flowmasters are "old news" in my book, but that's just my opinion. Anyway, as Andrew answered above, keep your "y" or "x" pipe in your system as it will give you better performance.
i have the 4.3 motor in it with the 2.7 in and out right now with no tail pipe im trying to find the best way to get better mpg whats best for new manifold or headders ive been thinking so much about this for so long now that im going crazy and forgetting things ive learned
Exhaust is the right size but i would continue it out the back. Headers could make a small difference. You already have the good vortec engine. The intake side is as good as its gonna get. Other than that maybe an ecu tune. But a high to expect is maybe 18 mpg.
18 is much better then the 12 that im getting now
12 is pretty bad, have you done a basic tune-up recently?
yupp the last thing i did to it was had to put a new distrubitor in it yea good thing i did, the gear was so worn down it was sharpened enough to cut my finger... trust me i take great care of my truck i work at advance auto parts and in a shop so there has been times i work on it even if i dont have to i just know whats old on it and what could be getting ready to brake i just rebuilt the motor 2 yrs back and i just been playin around with it ever sense
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