Mast Black Label LS3 heads and top end
For SaleEngine - Internals
Dec 9, 2025, 03:28 PM | Replies: 11 | Views: 1437
-
Price
$3,500• Trade
- Location Rochester, NY, 14586, USA
- Condition Used
Description:
Very nice Mast LS3 top end. Everything is in excellent condition and this setup was all used together (and a proven performer!). Mileage is approximately 4k.
- Mast Black Label LS3 heads, 255cc, 69cc chambers, 4.000" (+) bore
- Stainless valves
- BTR .660" platinum valve springs (new)
- Crower shaft mount rockers w/all hardware ($2300 new)
- Comp Cams 7741 pushrods (used with Johnson 2116 lifters)
- Precision Metalcraft sheet metal intake manifold (newly powder coated)
- Fuel rails w/ new fittings and crossover line
- Custom manifold vacuum lines and fittings
- Polished LS2 throttle body
- Katech aluminum valve covers (newly powder coated) w/-10an breather fittings w/all hardware
- Bosch 2200cc injectors (just cleaned and flow tested)
The intake and valve covers were just powder coated gloss black and absolutely beautiful. The intake is truly a work of art. It's the low rise version that clears the stock hood if used on a C6. There are a couple small marks in the valve covers but nothing bad. The heads are 6-bolt; however, two of the bosses were clearanced for the previous exhaust and these were only used on a 4-bolt block. You can either use as-is, mill the bosses off all together, or weld up the clearanced area if you're using a 6-bolt set up. Also, the valve cover insert says "Lethal Performance". Katech sells new blank inserts for $12 if you'd like to replace them.
New price on this stuff is around $12k.
-Complete top end (everything listed above) $7500 $6500 $6000
-Heads w/Crower shaft mount rockers $3800 $3500
Open to possible trades (up or down).
Last edited by JasonShort; May 2, 2026 at 07:49 AM.
Reply
I’ve always had great results with Mast Black Label heads also. Really nice stuff.
Willing to split the package up if someone first buys the heads and shaftmount.
Willing to split the package up if someone first buys the heads and shaftmount.
Last edited by JasonShort; Apr 19, 2026 at 01:24 PM.
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