Bullet Cylinder Heads Rb26 Head Vs Rb25

[MRHD66]

a interesting read that RB25 heads flow abit more up top but with more lift then the RB26 RB25

- STD valve size

- 100% cnc ported

Valve lift .100' .200' .300' .400' .450' .500' .550' Intake CFM 91 172 228 261 272 281 286 Exhaust CFM 76 136 176 188 192 194 196

RB26

- Accepts s.t.d. or oversize valves

- 100% fully c.n.c. ported

Valve lift

.100”

.200”

.300”

.400”

.435”

Intake c.f.m.

97

179

247

280

285

E xhaust c.f.m

83

146

173

188

192

[Joshbigt62r]

Where did you get this information from? I'd like to read it if you can send me a link please

Cheers josh

[MRHD66]

will do mate

[NYTSKY]

There is no real need to port RB heads to make power. I have seen plenty of stock port heads make crazy numbers.