SchweinoPower

Need to check how far my previous owner went with the exhaust. All he told me was he had Flowmasters (not sure even how to verify this, any markings on the pipes?) Exhaust consists of headers, X or H pipe, and the exhuast pipes itself (please correct me if I am wrong, I am newb.) if i recall.

Anyway to check if these parts are aftermarket? Thanks guys

Epinephrine186

my flowmasters say flowmasters on the muffler itself...im pretty sure 90% of all mufflers are gonna have their name somewhere on it.

Shawn02GT

what year stang?

HamMach1

Take a picture of the under side and we might be able to help!

SchweinoPower

97.

H0SS302

look under your car and see how many cats on on your midpipe, if u have 4 your stock,2 modded, 0....modded. if u have an x pipe..modded, and if your headers are really long...guess what, modded! but you should know how far your exhaust has been taken just by sound, theres only so much flows can do for a stang

SchweinoPower

What are cats exactly? I tried googling, dont even wanna know the results I got....and yes I am that newbish.

POISND U

97s have 6 catalytic converters, not 4. They have an element inside them that gets hot and stays hot to burn fuel that isn't burned in the engine for lower emissions.

SchweinoPower

ah, the box like objects on the pipe itself? Im bout to go outside an check right now lol.

2000GT4.6

+1.

Also, the stock manifolds are "log style" aka they don't have individual pipes coming from each manifold port, they just all run together down the length of the engine (they come out and immediatly just go in the same pipe.

LTs or shorties will have an indivial pipe off each cylinder and then twist around into a single collector right where it hooks up to your midpipe.