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Big Block Clones LLC

Shredder Cylinder Head - STAGE 0 - For GX200 and Clones - Predator

Shredder Cylinder Head - STAGE 0 - For GX200 and Clones - Predator

Regular price $64.95 USD
Regular price Sale price $64.95 USD
Sale Sold out
Bare with Seats and Guides or Fully Assembled and Ready To Run?
Chamber Volume - Smaller = High Compression Ratio

Full specs are listed at the bottom of this page. 

*FITS ALL ENGINES WITH GX200 AND CLONE HEAD BOLT PATTERN*

Want to bolt more horsepower onto your small block clone engine? The Shredder head is a high performance sand casting with much better ports than a stock style die cast clone heads.  The Shredder head flows up to 25% more air than OEM 212/224cc cylinder heads. 

With our complete head you'll get a 28.5mm stainless steel intake valve, 24mm stainless steel exhaust valve, both have 5.5mm stems, a compression boosting 18cc chamber, heavy-duty 1.2:1 ratio 0.095" thick stamped steel rocker arms, automotive style retainers with split keepers, and 26lb springs. We have test fitted dual valve springs up to 60lb rates with no fitment issues in the spring pocket. This is a killer upgrade for your engine, and if paired with a suitable cam and carburetor you'll see nice power gains. 

If you are bolting one of these heads on any non-hemi Predator or other Rato engine you'll need our stepped head dowel pins to adapt the 11mm holes in the block to the 10mm holes in these heads.

Sold in pairs here:

Stepped Head Dowel Pin Set - 10mm to 11mm

SHREDDER CYLINDER HEAD SPECS STOCK - STAGE 0 - 18cc Chamber
Stock Flow in CFM 80CFM (Approximate, depends on flowbench used)
Maximum Horsepower Supported Stock 18HP+
Recommended Cam 265 or 308 Depending on application
Recommended Carburetor Mikuni PE, PZ, or PWK 26mm or larger
Minimum Recommended Bore 68mm 
Chamber Volume 18cc (10.5:1 Static Compression Ratio on a 212 Predator with piston at zero deck)
Valve Material Stainless Steel without hardend tip, use lash caps
Intake Runner Volume 30cc
Exhaust Runner Volume 23cc
Intake Valve Weight 29 grams
Intake Valve Head Diameter  28.5mm
Intake Valve Stem Diameter  5.5mm
Intake Valve Total Length 66mm
Exhaust Valve Weight 22.6 grams
Exhaust Valve Head Diameter  24mm
Exhaust Valve Stem Diameter 5.5mm
Exhaust Valve Total Length 65.15mm
Valve Spring Rate 26LB/IN
Valve Spring Retainer Material Steel
Valve Spring Retainer Weight 7.8 grams each
Valve Spring Keeper Style Automotive Style Split with High Groove
Valve Spring Keeper Material Steel
Valve Spring Keeper Weight 0.65 grams each
Dowel Pin Diameter 10mm (We sell 10mm x 11mm stepped dowel pins)
Head Bolt Pattern Standard Small Block Clone
Intake Bolt Spacing Pattern Mikuni 48mm
Intake Bolt Size and Thread M6x1mm
Exhaust Bolt Pattern Spacing 47mm (like a HF 224)
Exhaust Bolt Size and Thread M8x1.25 (Standard Clone)
Rocker Arms 0.095" thick stamped steel 1.2:1 Ratio
Rocker Arm Weight 25.3 grams each
Pushrod Guide Plate Standard Small Block Clone
Rocker Arm Studs Screw-In Steel M6x0.50mm/M8x1.25mm
Weight (bare casting) 2.342lbs
Valve Seat Angles Three
Valve Seat Material Steel
Valve Guide Material Steel
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