Ultimate LS Cathedral Port Cylinder Heads Guide - LS Engine DIY
Sep 24, 2015 · These 50-state-legal heads are fully CNC-ported, and a nice upgrade over stock LS1, LS6, or LS2 heads. The cost is kept down, but the quality is kept up. These heads are a great choice for a stock-cube build, yet provide plenty of …
LS 873 Cast Iron Cylinder Head CNC Porting Service - CNC …
Actual item may vary. **Cylinder head assembly available, please call for pricing.
LQ4 6.0 LS heads - Don Terrill’s Speed-Talk
Mar 2, 2021 · So the truck is a 1999 6.0 LS LQ4 engine, and it has the cast iron 873 heads. I found some stock flow numbers they say 253 intake and 184 exhaust @ .6 lift.
History of the LS Engine and Cylinder Head Casting Number ... - MotorTrend
Sep 1, 2017 · The LS1 heads have 67cc chambers with 2.00/1.55-inch valves. Other heads you'll run into are 852 and 706 castings, which have smaller 61cc chambers and 1.89/1.55-inch valves.
Sloppy Mechanics Wiki - LSX Head cast numbers / flow /swap info
The LS2 heads (243 or 799 casting) have the "heavy" standard LS1 valves. However, they do have the LS6 springs. Only the true LS6 engine heads have stainless steel (not titanium) hollow...
The LS6 cylinder heads is essentially a tuned -up version of the LS1 head. At 65cc, the combustion chamber is slightly smaller and more efficient than the LS1.
Heads & Cam Packages - Texas Speed
Add 100+ horsepower to your GM LS or Gen 5 LT engine with a Texas Speed & Performance cylinder heads and camshaft package! Our packages will include cathedral port, square port, and rectangular port cylinder heads to accommodate LS1, LS2, LS3, L99, LS6, LS7, LSA, LQ4, LQ9, L83, L86, LT1, and more!
Difference between 241, 243 and 853 heads?? - CorvetteForum
Jul 16, 2007 · 853 and 241 are basically identical. 853 was used on 99-00 LS1 engines. 241 was used on 01-04 LS1 engines. They both have a 66.67 cc combustion chamber (10.1 CR), 200cc intake runners, and 70cc (round) exhaust ports. The 243 head is the 01+ LS6/LS2 head.
GM LS LQ4 6.0L Rebuilt Cylinder Head 873 99-00 CAST Suburban …
Aug 14, 2024 · GM LS 6.0L LQ4 Rebuilt Cylinder Head. LQ4 Applications Casting Number: 12561873 / 873. U 1999-00 Chevy Silverado 2500. U 1999-00 Chevy Suburban. U 1999-00 GMC Sierra 2500. The head has been rebuilt by our engine specialists and is ready to be installed.
GM LS LQ4 6.0L Cylinder Head Set 873 99 - eBay
Apr 9, 2025 · Find many great new & used options and get the best deals for GM LS LQ4 6.0L Cylinder Head Set 873 99 - 00 CAST Suburban Silverado Sierra at the best online prices at eBay! Free shipping for many products!