3" exhaust

[sjk5.lt]

hi im looking at putting a 3" single lukey system on my vx ss with extractors
has anyone got any info on this setup do i need hiflow cats with it im also doing a tune shortly aswell thyanks

[HoldenMan7]

Hey Mate

Just wondering why ya not going the TWIN 2 1/2" ???

[sjk5.lt]

yeah ive got one on it now but its worn out so im just looking to update its not bad but its a bit droney

[johnvtls1]

single 3 inch is too small man either go twin 2.5 or twin 3. but twin 3 is probably to big or a stocker.

[Not_An_Abba_Fan]

Go 2 1/2" twin unless it's cammed, then go twin 3". Change the cats to metal substrate, also change the pipes to the front of the cats and from the rear of the cats to the flanges to 2 1/2".