chevrolet Portflow Valves from RPM Machine

Ideal for both competition and street applications, they are similar in material and design to SI's competition valves, but manufactured in large production runs for all of the most popular applications. Because of the fully automated (robotic) production, SEV-series valves are priced lower than racing models, yet feature the same premium quality stainless steel forgings, chrome stems stellite tips and swirl-polishing. If you do not see a valve you need in the Competition or Silver line Series, use the Portflow, as they are suitable for these applications.

Quicksilvers feature increased undercut stems and thicker margins for increased flow and performance.

SI Valves

Back to Chevrolet Portflow Menu

DESCRIPTION	LENGTH	PART NUMBER	PRICE $EA
1.720 S.B. Chevy Intake (.100 Long)	4.98	SEV-2091+100	8.60
1.720 S.B. Chevy Intake	4.88	SEV-2091-C	7.52
1.720 S.B. Chevy Intake (1 Groove)	4.88	SEV-2091-SG	8.73
1.600 S.B. Chevy Exhaust Valve	4.88	SEV-2469-C	7.50
1.600 S.B. Chevy Exhaust (No Chrome)	4.88	E-2469-HP	7.50
1.600 S.B. Chevy Exhaust	4.98	SEV-2469+100	8.53
Undercut +100
1.600 S.B. Chevy Exhaust 1 Groove	4.88	SEV-2469-SG	7.50
1.600 S.B. Chevy Exhaust +200	5.110	SEV-2469SG+200	Call
1.600 S.B. Chevy Exhaust	4.900	SEV-2469 CW	8.53
2.020 S.B. Chevy Intake Valve	4.88	SEV-2470-C	9.28
2.020 S.B. Chevy Intake Valve	4.88	SEV-2470-E	7.50
2.020 S.B. Chevy Intake (No Chrome)	4.88	I-2470-HP	7.50
2.020 S.B. Chevy Intake Undercut +100	4.98	SEV-2470+100	10.08
2.020 S.B. Chevy Int. 1 Groove	4.88	SEV-2470-SG	7.98
2.020 S.B. Chevy Intake	4.900	SEV-2470-EW	8.53
1.940 S.B. Chevy Intake Valve	4.88	SEV-2552	7.50
1.940 S.B. Chevy Intake Valve	4.88	SEV-2552-C	7.55
1.940 S.B. Chevy Intake Valve	4.88	SEV-2552-E	7.50
1.940 S.B. Chevy Intake 1 Groove	4.88	SEV-2552-SG	9.07
1.940 S.B. Chevy Intake Undercut +100	4.98	SEV-2552+100	7.67
1.500 S.B. Chevy Exhaust	4.88	SEV-2809	7.50
1.500 S.B. Chevy Exhaust (.100 Long)	4.98	SEV-2809+100	8.53
1.500 Chevy Exhaust Valve	4.88	SEV-2809-C	7.50
1.500 S.B. Chevy Exhaust 1 Groove	4.88	SEV-2809-SG	8.53
1.840 S.B. Chevy Intake Valve	4.88	SEV-3091	7.50
1.840 S.B. Chevy Intake 1 Groove	4.9	SEV-3091-SG	8.04
1.840 S.B. Chevy Intake (.100 Long)	5.01	SEV-3091SG+100	11.92
1.840 S.B. Chevy Intake (.100 Long)	5.013	SEV-3091+100	9.28
1.840 S.B. Chevy Intake Valve	4.912	SEV-3091-C	7.76
(11/32 Stem)
1.840 S.B. Chevy Intake	4.900	SEV-3091-SG-S	Call
1.840 S.B. Chevy Intake	5.060	SEV-3091-SG+150	10.83
2.080 S.B. Chevy Intake Valve	4.95	SEV-3122-E	10.62
2.080 S.B. Chevy Intake (.100 Long)	5.05	SEV-3122+100	10.83
2.080 S.B. Chevy Intake Undercut	4.95	SEV-3122-PF	12.09
1.625 S.B. Chevy Exhaust Tulip	4.96	SEV-11557	9.07
1.625 S.B. Chevy Exhaust +100	5.01	SEV-11557-PF+	12.28
2.055 S.B. Chevy Intake Valve	4.9	SEV-11598	12.28
2.055 S.B. Chevy Intake (.100 Long)	5	SEV-11598+100	12.23
1.625 S.B. Chevy Exhaust (.200 Long)	5.11	SEV-11557+200	11.36

CHEVROLET APPLICATION Portflow Series (Small Block V8)

CHEVROLET APPLICATION
Portflow Series (Small Block V8)