curtis sparks x-4

[81 clark racing]

it says good for stock motors tight tracks and the woods. will it also work good if i decide later on to bore my 400ex and do high comp piston and all that? or am i better off getting the x-6, but then will that work good with my 400ex stock motor? also compared to the procircuit T-4 is it louder? thanxs

[oldskoolex400]

c'mon man i told you the x-6 already

[81 clark racing]

i had all ready posted it before i asked you

[250exkid]

it depends on how long your going to keep your motor stock. if its going to be a long time then get x-4 but if its not gonna be stock for a long time go for x-6:chinese:

[oldskoolex400]

get the x-6 anyway the resale is alot better than a x-4

[400eXr1d3rZ]

Sparks x6 regardless if you have a stock motor or modified, it works great for my motor, although it's not stock :D

[300ex#5]

i'd go with the x-6, you would be better off with it