The muffler tips from Fast Toys Performance are of exceptional quality.  They are made of polished T304 stainless steel.  Unlike tips from competitors these tips can not be bolted onto the stock tips and require a more professional installations.  The stock muffler tips need to be cut so they will not be visible when you look down the tips.  The Fast Toys tips are then permanently welded onto the stock mufflers.

The front of the tip is rolled and the rear narrows down to narrowly fit over the stock muffler tip which measures about 3".  The exact measurement of my stock GT muffler was 3.03".	The narrow end of the Fast Toys tip measures 3.09"  to allow for tolerances in the stock muffler tips.
At 4.01" the end of the Fast toys tips is a full inch larger then the stock muffler tips.  The finish is polished to a mirror like shine.	The inside diameter of the rolled end on the Fast Toys muffler tips measures in at 3.33".
I placed the Fast Toys tips over the stock muffler tips to test the fit. Immediately, it was obvious that the stock tips would need to be cut closer to the muffler so that they could not be seen when looking into the muffler tips.	The narrow end of the Fast Toys tips fits easily over the stock tips. The diameter of the stock muffler tips narrows as it gets closer to the muffler.  The Fast Toys tips need to be welded to the wider portion of the stock tips.  On my mufflers, there was a .06" gap between the stock tip and the lip of the Fast Toys tip.