BeachCat

iTrader: (1)

I know many people have covered this topic on here before and on many other sites and I have done my research but I still some have unanswered questions. Okay so first off Im doing a rebuild on my 13b rew fd and I want to do the cosmo 13b re uim/lim swap with the 20b tb, while I have it all apart. I know the runners are different and need to be ported on the rew irons, but I was just wondering if it would be wiser just to buy 13b re cosmo irons and use them instead. I just need to know if there are any differences between the two other than the intake port sizes, and will they work with the rew housings? or should I just port the rew irons?