Wtf this cant be right can it?

[PhatTonyDeMarco 5,000+ posts]

No, it's not correct. You're doing a single 4" port for two 12" R's? That is not going to have good results, guy...

Do a single 6", or two 4's at LEAST.

Click to read more...

 

[DBfan187 5,000+ posts]

http://www.psp-inc.com/psp-inc.com/public_html/..%5Ccgi-bin%5Cport_length_calculator.cgi

correct

 

[PhatTonyDeMarco 5,000+ posts]

Hmm... I got that as well from a couple programs, seems off but oh well. Is this not a daily vehicle? It's going to sound like garbage tuned that high.

 

[OneKrazyKeebler 10+ year member]

Don't forget about adding 1" for each flare.