3" ids2 series or 4"aluminum for my recon?? whats best??

 

whats the 4"aluminum????????Also can you get a racing core ids-2 for a recon???????????????????????????????????????????
1986 Trx 125-brothers
1984 Trx 200-my mad machine
2 2001 recons- getting soon
2001 Cr 250 -dad is getting soon

 

I'm not sure the 4" silencer is still available. It has been replaced by the IDS 3".

 

I don't think the 4" Aluminum is sold anymore. If it is, you can't get it for Recon (that I know of).