Chevrolet Small Block
"Log" and "Chevy II" Style Exhaust Manifolds and Pipe Kits

CAST IRON "LOG" EXHAUST MANIFOLDS

Left Side Log Manifold
Left Side Log Manifold

The “under the plug” design Log manifolds are available stock or modified. If your chassis or rules don’t allow the use of Corvette manifolds, Log manifolds are the way to go!

  • Easier to install on a Camaro or Chevelle than either of the Corvette manifolds.
  • Modified Log manifolds produce an 11 horsepower gain at 5,500 rpm.

Modified Log manifolds have a 2 1/4" outlet versus the 2” outlet on stock manifolds. Manifold has 2 3/4" flange bolt pattern.

NOTE: Due to “under the plug” design, stock type motor mounts must be used. Also, some type of spark plug shields are a must when running angle plug heads.

Part # Description Price per pair
192 Modified Log manifolds. 1 pair of new manifolds.
595.00



Right Side Log Manifold

Right Side Log Manifold

CAST IRON "CHEVY II" EXHAUST MANIFOLDS

Left Side Chevy II Manifold
Left Side Chevy II Manifold

Right Side Chevy II Manifold
Right Side Chevy II Manifold

Modified "Chevy II" type exhaust manifolds. These "Mini Ram-Horn" manifolds go over-the-top like the Corvette manifolds but angle back at a 45 degree angle for more frame clearance.

 

Like the Log manifolds, these Chevy II manifolds have a 2" outlet in stock from. The modified manifolds have a 2 1/4" outlet.

 

Part# Description

Price per pair

163A Modified "Chevy II" exhaust manifolds, pair.      495.00

"Gasketless" Pipe Kits for "Log" & " Chevy II" Exhaust Manifolds

Gasketless Pipe Kits

Gasketless Pipe Kits include 2 Gasketless Adapter Pipes and 2 mandral bent pipes.  This is the starting point for your exhaust system.

A = Floating 1/4 inch Thick Flange
B = Metal Sealing Ring welded to Pipe Adapter

#193F Gasketless Adapter Pipe: Metal sealing ring tig welded to pipe provides the sealing and the 1/4" thick flange provides the clamping power.
Part # Description Price
193

Gasketless Pipe Kit: Adapts 2 1/2" pipes to Log manifolds. Includes: (2) Gasketless Adapter Pipes, (1) 45° pipe, (1) 90° pipe, hardware & instructions.

150.00
166A

Gasketless Pipe Kit: Adapts 2 1/2" pipes to Chevy II manifolds. Includes: (2) Gasketless Adapter Pipes, (2) 45° pipes, hardware & instructions.

150.00
193F Gasketless Adapter Pipe. Adapts 2 1/2" pipe to the 2" outlet manifolds. 1 side only. 47.50

 

Stock & Modified Log Manifold Dyno Tests
with 2-into-1 Collector

Log type manifolds really like 2-into-1 Systems. With our 2-into-1 collector, you can add 25 hp and 31 ft/lbs of torque at 5000 rpm.

Below 6000 rpm is where the 2-into-1 systems really shine. The addition of a 2-into-1 Collector added 25 hp at 5000 rpm. Also, the modified Log manifolds showed a solid 6 to 11 hp gain over the stock manifolds.

2 into 1 exhaust system components.

Stock & Modified Log Manifold Dyno


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