Just finished with Martin's 378 gen3...we made 555HP @6800rpm, and 469TQ @5400rpm with the Arrow intake. After we tuned the engine for this intake, we swapped on the Ritter intake and made some pulls.
The AFR's were near identical, timing remained the same...the Ritter DP intake made about the same TQ @3000rpm which was 404-406 lb.ft. which we thought was pretty good for a small cid pump gas engine.
After that, the Ritter intake took over making 577HP @6800rpm and 486TQ @5400rpm.
So if you can somehow package the ritter intake into the car, it's going to make more power, however it also costs more...the Arrow intake is much shorter (I will post pics and more info at a later time)and doesn't give up too much in terms of power output, and costs less.
Thank you to Rod for the intake, and especially Martin who has been an exceptional customer of ours over the years!
Brian