I drove last season the 353 (m.mod) with 2630 pipe combo. This was the most worst combination. My JLR red dot was more powerfull ... I had big temp problems, no bottom power and no top power. After that I changed my pipe. I tried skyline plus 12 with nova mid. manifold . After that came the power back. Now is the engine really a monster with a lot of power every where. And no high temp. problems. My next test is 2602 max.