Car won't start

[zxocmars]

Started the car this morning and she fired straight off

Changed the exhaust for a 2.5 SS straight thru, and now won't fire.

Car tried to fire, but then cut out, and now it just won't fire at all.

I have fuel, and I have spark.

I have been advised that there is a possibility that the cambelt has jumped, screwing up all the timing.

Any advice on how to correctly check this please?

TIA