Greddy Lower IC pipe

i need to get an adapter to go from my greddy 24 IC to the Greddy lower IC piping, i thought it was a 2 1/2" - 2 1/4" but im not sure. You guys know which coupling size it is?

i thought they were dirrect fit 2 1/2 on bith. i dont know man, you might try checking the diamiter with a ruler.

yeah, i just dont feel like taking off my whole front bumper, i figured someone on here might know off hand.