Lude Generation

Morning guys!!!
I'm going to have a full custom exhaust put on my lude but I would be grateful If anybody can advise me on the best size pipe to use on the manifold before it gets made

who is making it?

Hi it's an engineering company in Leeds I know well
Just need to know what size pipe to buy

you cant go wrong with 2.5" for custom exhaust or 3" if you plan on going turbo

depends on what part of the manifold your talking about primaries or secondaries?

3" offers best hp on na or turbo. 2.5" is a good compromise for torque and hp and noise.

In talking about the primary
I'll measure the exhaust ports and go from there

ive got my hytech replica header here if you want any dimensions from that

normally 1.75" or 2" if i remember right matey

fujitsubo specs -

Primary runner inner diameter - 44mm (~1.73") at head flange
Primary to Secondary merge inner diameter - 48mm (~1.89")

Secondary runner inner diameter - 48mm (~1.89")
Secondary to Collector merge inner diameter - 60mm (~2.36")