i have a k20a2 with the stock intake manifold PRB my buddy with k20 r swap civic is putting on a rrc on and is selling me the PRC for 25

it looks the same as my PRB is it the same thing just with a different stamping on it?

 

The PRC flows much better in the midrange & up top.... you should make 5-10whp gains properly tuned. without tuning you should make about the same power with smaller gains 2-5whp

 

Just like Mike said. Runners are bigger in diameter ID&OD, should be able to see a nice increase when properlly tuned.

 

where does the RBC manifold sit in relation to these two?

 

the rbc manifold is the best manifold for a k motor.. it has much smaller runners and flows much better than the others. I had a k20z1 with bolt ons and gained 12 whp after replacing my PRB with the RBC.

 

i don't know about ur rbc talk. did u tune ur motor with the prb equipped or did u only tune after the rbc was installed? this is usually why people think the rbc is a vast improvement

 

i ran my motor with the stock prb manifold for about a month or so and did have it tuned and again i gained 12 whp after installing the rbc manifold with a hondata intake manifold and retuning it..

 

I'm in tge exact same situation except I have stage 1 cams I'm think hard weather or not I should switch my prb to prc to gain more midrange and tq any1 can clarify this??