Dual exhaust 1991 LS400

[LexUser4.0]

I'm getting a dual X pipe installed in my car. My question is what would the best diameter exhaust be? I also have plans to port the intake and the heads if that makes any difference. Thanks

 

[gloverman]

There are some really helpful online exhaust size calculators which match exhaust size with crank hp. Then you can design a system suitable for for plans. Cheers

 

[LexUser4.0]

There are some really helpful online exhaust size calculators which match exhaust size with crank hp. Then you can design a system suitable for for plans. Cheers

Oh ok sounds good. Thank you very much.