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- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 9 - Jul 14
For Your Every Summer RSVP, with Code: SUMMER15
Description
DART SHP LS Next PRO Cast Iron Engine Block 4.125" Bore 9.240" DeckThe Dart SHP LS Next PRO Cast Iron block is the ultimate upgrade for your build. The Dart SHP block is designed to support high flow & efficient cylinder head developed for the LS platforms, Whilst rectifying some of the noticeable issue of the 'Y' shaped LS bottom ends. This block is the ultimate foundation for your build. Features Of Your New Dart SHP LS Next Pro Cast Iron Block Cast with superior strength 220 BHN (Brinell Hardness) premium cast
The Dart SHP LS Next PRO Cast Iron block is the ultimate upgrade for your build.The Dart SHP block is designed to support high-flow & efficient cylinder head developed for the LS platforms, Whilst rectifying some of the noticeable issue of the 'Y' shaped LS bottom ends.
This block is the ultimate foundation for your build.
Features Of Your New Dart SHP LS Next Pro Cast Iron Block
- Cast with superior strength 220 BHN (Brinell Hardness) premium cast iron;
- Conventional style 4-bolt steel main caps;
- ARP Main Studs;
- Full main webbing for maximum bottom-end strength;
- 6 bolt per cylinder capability;
- 8-counterweight machining;
- Full skirt design;
- Extended cylinder barrels at the bottom to provide greater piston support for all combinations;
- Extra-thick Siamese cylinder bores;
- Blind head bolt holes don't go through into the water jacket;
- Provision for lifter oil restrictors in the lifter valley;
- Priority main oiling;
- Pro-Stock/Pro-Mod big block style stepped main oil galley;
- Thick deck to ensure reliable head gasket seal;
- External oil filter (must be used with stock or aftermarket oil pumps);
- Dual starter mounts;
- Expanded water jacket on #1 cylinder for additional cooling capacity;
- LSX-style lifter bosses and dog bone provision are provided;
Specifications
- Brand:Dart;
- Manufacturer's Part Number:31867212;
- Main Journal Type:LS mains;
- Engine Block Style:Aftermarket;
- Deck Height (in):9.240 in.;
- Cylinder Bore as Shipped:4.115 in.;
- Cylinder Bore Diameter: 4.125 in.;
- Maximum Bore Diameter:4.185 in.;
- Engine Block Material:Cast iron;
- Engine Block Weight (lbs):227 lbs.;
- Main Bolt Style:4-bolt;
- Main Caps Included:Yes;
- Main Cap Material:Steel;
- Main Cap Fasteners Included:Yes;
- Main Bearings Included:No;
- Rear Main Seal Style:1-piece;
- Finished Cylinder Bores:No;
- Raised Cam Location:No;
- Cam Bearings Included:No;
- Freeze Plugs Included:No;
Want To Know More About Our Dart Engine Packages?
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Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.2 ★★★★★
Based on 435 reviews
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Product Reviews
★★★★★ 5
Buy it
If you're looking for a comfortable thick and nice turtle neck this is the one. It's nice and form fitting nice weight to it to keep you warm. But not to thick that you cant just wear it on a regular sunny day if you wanted. The design pattern Is also very nice. Can dress it up or down. I bought the black and then immediately bought the rust orange color for my friend once he tried on mine he wanted one immediately so I gifted him one. He loves it. Definitely worth the buy. Excellent quality. I bought a Large 5"11 165lbs
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Reviewed in the United States on December 21, 2024
★★★★★ 5
What you see is what you get!
Color: 01-black, Size: Large
Fits great, fabric is amazing, turtle neck fits tight, and the quality is amazing!
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Reviewed in the United States on February 11, 2026
★★★★★ 4
A true turtleneck that retains a snug high neck.
Color: White, Size: X-Large
I've found this brand to have gotten better over the years as far as offering the American market what it needs in terms of realistic sizing. I only wish they'd realize that there are a lot of us who are long in the back and arms where my only choice is to go a size up and sacrifice a slim fit for sleeves that are long enough plus a back that doesn't go up past my waist just because I reach up for something, that and I like to be warm. So these are such nice quality turtlenecks that it's hard to complain about but maybe the company will read this. The snug neck stays up is plus number one since that's why I'm buying a full neck. They come with very nice weaves in the fabric, good enough for casual or formal wear. Finally the warmth you seek is there but I've worn them in what most would think isn't the right temp for a turtleneck. Also they have them in white! Yes, a lot of others just don't for reasons I can't fathom, and the pic you're seeing is accurate, these will form to your shape without being ridiculously thin material. Several washes later and they are as fine a garment as when I first wore them. I've only found one other brand that compares to these but it's much more expensive, COOFANDY is affordable in these times of expensive everything. Warm but also a lightweight shirt, I've gotten them really dirty with actual dirt and it washes out so well you'd never know it. Don't let my taking off one star stop you, try one yourself and you'll be coming back for more.
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Reviewed in the United States on July 30, 2025
★★★★★ 5
Quality,warmth and fit
Color: Royal Blue, Size: Small
Really top quality. This is my 4th purchase of these Really great sweaters.
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Reviewed in the United States on February 12, 2026
★★★★★ 5
Nice Sweater
Color: 01-black, Size: Large
This is a very nice sweater. It’s reasonably thick and warm. Looks nice. I like it.
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Reviewed in the United States on January 18, 2026