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Chevrolet 262-400 Small-Block V8
STREET TUNNEL RAM (3500-7500 rpm)
Designed for 302-327-350-400 c.i.d. small-block Chevy V8s operating below 7500 rpm where
low-end torque is not a prime factor. Great for engines with slightly modified heads. Applicable to
street machines, street rods, pro street and marine.Will not fit 1987 and later cast iron heads. Use with Torker-
Plus camshaft kit #5002 for low-end torque or Performer RPM camshaft kit #7102 for more top-end power.
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| Applications |
Part # |
| Street Tunnel Ram (complete manifold - base and top) |
#7110* |
| Street Tunnel Ram (base only) |
#7067* |
| Street Tunnel Ram (top only) |
#7032* |
| Throttle Linkage for forward mounted carbs |
#7097 |
| Throttle Linkage for sideways mounted carbs |
#7071 |
| Gasket (included with base and top) |
#6999 |
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Carburetor Recommendations:
Edelbrock Performer Series carbs #1404, 500 cfm (see Carbs & Accessories) - for forward mount only.
Holley #0-9776 (450 cfm) - for sideways mount only.
Installation Notes: Top has vacuum outlet for power brakes. Manifold will accept forward and sideways
mounted carbs. Distance from carb center to carb center: 8.875". H.E.I. ignition will not clear manifold.
Recommended intake gasket: Edelbrock #7201. Manifold height (top with bottom): A-9.00", B-9.60" see
A/B Measurements. Port exit dimensions: 1.12" x 2.12".
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Chevrolet 262-400 Small-Block V8
C-26 DUAL-QUAD (1500-5000 rpm)
Designed for 1955-86 262-400 c.i.d. S/B Chevys, this dual-quad is low profile for hood
clearance on most vehicles. Air-conditioning bosses and front oil filler tube boss included. Stock
alternator brackets do not fit. C-26 Dual-Quad manifold #5426 is designed for Chevy V8s with 1996
and later Vortec (L31) cast iron or the Edelbrock E-Tec aluminum heads. An external water bypass boss is
machined into the front of the water crossover for use on 1996 and later Vortec production engines. Carb
center to carb center: 6-7/16". Use with Performer-Plus cam #2103 for low-end torque or Torker-Plus
cam/kit #5002 for top-end power.
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| Applications |
Part # |
| C-26 Manifold (non-EGR) |
#5425* |
| Polished C-26 Manifold (non-EGR) |
#54251* |
| C-26 Manifold with EnduraShine (non-EGR) |
#54254* |
| C-26 Vortec Manifold (non-EGR) |
#5426* |
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| Carburetor Recommendations:
Edelbrock Performer Series carbs #1404, 500 cfm (see #1404)
Installation Notes: H.E.I. will fit. Recommended intake gasket: Edelbrock #7201 (for #5425); #7235
(for #5426). Manifold height: A-2.95", B-3.30" see A/B Measurements. Port exit dimensions: 1.18" x 1.90".
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Chevrolet 262-400 Small-Block V8
C-357-B THREE-DEUCE (idle-5500 rpm)
Designed for 1955-86 262-400 c.i.d. small-block Chevys, this manifold has a balanced 180°
firing order port runner arrangement. It contains an exhaust gas heat riser and offers excellent
performance potential. Front oil filler tube boss included. Carb center-to-center: 5-1/2". Use with Performer-
Plus camshaft and lifter kit #2103 for low-end torque or Torker-Plus cam/kit #5002 for top-end power. Note: A pad/boss in the front manifold of is drilled for an oil fill tube.
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| Applications |
Part # |
| C-357-B Vortec Manifold (non-EGR) |
#5417* |
| Classic Valve Covers (see Classic Aluminum Valve Covers) |
#4145* |
| Vintage Series C357B 3x2 Manifold for Stromberg 3-bolt carbs |
#5418* |
| Vintage Series C357B 3x2 Manifold (non-EGR) |
#5419* |
| Polished C-357-B Manifold (non-EGR) |
#54191* |
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| Carburetor Recommendations: Rochester 2GC (small 1-7/16" bore)
Installation Notes: H.E.I. will not fit. Recommended intake gasket: Edelbrock #7201.
Manifold height: A-3.9", B-4.6" see A/B Measurements. Port exit dimensions: 1.12" x 1.87".
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RPM Air-Gap Dual-Quad (1500-6500 rpm)
Designed for 1955-86 S/B Chevys, this intake stands 1-5/8" taller than the low-profile C-26
intake and offers performance improvements in the 1500-6500 rpm range. The large runners
feature our unique Air-Gap design that separates the runners from the hot engine valley for a
cooler, denser charge.
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| Applications |
Part # |
| RPM Air-Gap Dual-Quad manifold (non-EGR) |
#7525* |
| RPM Air-Gap Dual-Quad manifold w/ Polished finish (non-EGR) |
#75251* |
| RPM Air-Gap Dual-Quad manifold w/ EnduraShine™ finish (non-EGR) |
#75254* |
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| Carburetor Recommendations: Edelbrock Thunder Series AVS or Performer Series carb, 500 cfm.
Installation Notes: H.E.I. will fit. Recommended intake gasket: Edelbrock #7201. Manifold height: A-4.57", B-4.92" see page 46. Port exit dimensions: 1.16" x 1.92". Carb center-to-center distance: 6-7/16".
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RPM Air-Gap Dual Quad Vortec (1500-6500 rpm)
Designed for 262-400 c.i.d S/B Chevys with 1996 and later Vortec cast iron or Edelbrock E-Tec heads, this intake stands 1-5/8" taller than the low-profile C-26 intake and offers performance improvements in the 1500-6500 rpm range. The larger runners feature our unique Air-Gap design that separates the runners from the hot engine valley for a cooler, denser charge. Also available as a complete carb and manifold kit.
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| Applications |
Part # |
| RPM Air-Gap Dual-Quad manifold for Vortec (non-EGR) |
#7526* |
| RPM Air-Gap Dual-Quad manifold for Vortec with EnduraShine™ finish (non-EGR) |
#75264* |
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| Carburetor Recommendations: Edelbrock Thunder Series AVS or Performer Series carb, 500 cfm.
Installation Notes: H.E.I. will fit. Recommended intake gasket: Edelbrock #7235. Manifold height: A-4.57", B-4.92" see page 46. Port exit dimensions: 1.16" x 1.92". Carb center-to-center distance: 6-7/16".
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RPM AIR-GAP DUAL-QUAD LS1 (1500-6500 rpm)
Now, hot rodders can have the late-model muscle of the popular Gen III and the classic
look of dual-quad carbs. Designed for LS1, LS6, LM7 (5.3L), LR4 (4.8L), and LQ4 (6.0L)
engines, the new RPM Air-Gap LS1 Dual-Quad delivers outstanding performance from 1500
to 6500 rpm. Included with the #7518 is an electronic timing module that picks up MAP, crank position, and cam position in order to drive the stock ignition system. Also available, complete carb and manifold kits. |
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| Applications |
Part # |
| RPM Air-Gap Dual-Quad manifold for Vortec (non-EGR) |
#7518* |
| RPM Air-Gap Dual-Quad LS1 manifold for GM Gen III (non-EGR) w/ EnduraShine finish |
#75184* |
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| Carburetor Recommendations: Edelbrock Thunder Series AVS or Performer Series carb, 500 cfm.
Installation Notes: Uses LS1/LS6 style individual port o-ring seals. Crankshaft sleeve #HP3795 and
Flexplate #HP4004 is recommended when using a TH350, TH400 or 700R4 on a LS1; these items are
available through Hughes Performance retailers or you can call Hughes at 800-274-RACE.
Manifold height: A-5.05", B-5.64"; Carb pad height: 5.35". Port exit dimensions: .98" x 2.72". |
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