need more horse power with exhaust
 

I don't need to pass emissions with my 87 rx7 13b. I want a good exhaust system that gives the horse power and sounds good but not too loud. I also want an air induciton system. what is recommended? thanks RRRXXX7

I think its a racing beat exhaust your needing ...i ran 2 ,1.5 inch pipes off of that and 2 mufflers and it worked great for mine my setup was 82 12-a with aftermarket 4 barrel intake slightly portedwith a 600cfm carb i relieved some of the spring pressure on the back barrels so they would open a little earlier it all seemed to work perfect except for the bog you get from over carbing at lower rpm's
i think the tradeoff was well worth it especially at high rpm's around 10k