Name: Shredder RPM+ Head and Carburetor Kit
Brand: Big Block Clones LLC
Price: 249.95 USD
Availability: InStock

This is the perfect kit for small displacement GX200s and Predators that want good response and high RPMs!

This all-in-one head, carburetor, and accessories kit saves you time, money, and takes the guess work out of building a powerful setup for any kart or minibike. This high performance induction bundle includes the following:

Assembled and ready to run Shredder RPM+ cylinder head.
Precision machined port matched billet cylinder head to carburetor adapter with stainless button head hex screws and o-ring seal.
Special thick ribbed fiber reinforced silicon rubber boot in your choice of five different colors with clamps.
High quality 28mm PWK style carburetor with jet kit included.
Large high flow cotton gauze air cleaner element with clamp.

Everything you need from the head and induction side to get your Predator 212, 224, Ducar, or other small block GX200 style engine moving fast. You can use stock length 5.270" non-hemi pushrods with this head and intake combo and everything will bolt together just fine. Add a billet connecting rod, flywheel, and Dyno 265 or 308 cam with chromoly pushrods for 18+HP. Remember that our standard Shredder head is equivalent to the other guy's "Stage 3" heads, and the RPM+ option adds all of the hardware of the Stage 1 head and is good for 9,000+ RPMs.

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

Here are OUR flowbench's manometer numbers for the small block heads that we've tested:

Engine Designation	.100"	.150"	.200"	.250"	.300"	.350"
Loncin H225 hemi	0.30	0.44	0.53	0.53	0.53	0.53
Ducar 212 hemi	0.25	0.45	0.57	0.57	0.58	0.59
Predator 212 hemi	0.25	0.45	0.54	0.59	0.60	0.62
Predator 224 non-hemi	0.32	0.56	0.64	0.66	0.70	0.73
Predator 212 non-hemi	0.23	0.47	0.66	0.70	0.75	0.79
Northstar c225	0.28	0.68	0.70	0.73	0.77	0.81
Wildcat WC946	0.38	0.67	0.77	0.81	0.82	0.83
Shredder Stage 0	0.28	0.54	0.74	0.84	0.91	0.94
Shredder Stage 1	0.31	0.63	0.92	0.96	1.03	1.08

And here is a link to our FAQ on the Shredder head with a more detailed explanation:
Shredder Head FAQ

Here is more detailed info on the RPM+ head that comes with this package:

This is our standard 80CFM Shredder head with lapped valves and hand assembled with a high RPM valvetrain that will support up to 0.430" lift at the valve and 9000+ rpms.

The following hardware is assembled into this ready-to-run head:

28.5mm x 2.600" x 5.5mm stem stainless steel intake valve

24mm x 2.600" x 5.5mm stem stainless steel exhaust valve

0.015" steel shims/spring seat

Red stripe dual springs installed at 0.947" for a 35lbs rate on the seat

Titanium retainers (weighs a touch less than 7071 aluminum but has more strength and much better fatigue resistance.)

Steel medium groove keepers

Lightweight lash caps

Steel pushrod guide plate

1.2:1 ratio 0.095" thick stamped steel rocker arms with studs, lash adjusters, and locking nuts. (308 cam gets to .369" lift, 315 gets to .378" lift)

Pair this head with a Dyno 315 cam and our 28mm carburetor kit for a 20hp capable engine.