Way back in December 2022, Chevrolet Performance launched a crate version of the naturally aspirated 6.6L V8 L8T gasoline engine found in the Silverado HD and Sierra HD pickup trucks. As the only Gen V Chevy Small Block powerplant to feature an iron block, the L8T is a popular offering for boost-hungry folks. That being said, the Bow Tie brand’s performance department has released a new variant of the L8T, dubbed the L8P.
At first glance, it may be tough to spot the differences between the two engines. Indeed, the L8P shares many of the defining characteristics of the L8T, including a total displacement of 400 cubic inches – or about 6.6 liters – thanks to a cylinder bore of 4.060 inches (103.25 mm) and cylinder stroke of 3.860 inches (98 mm). However, where the L8P diverges from its L8T brethren lies in the valvetrain.
6.6L V8 L8P
The L8P powerplant features a unique camshaft based on the naturally aspirated 6.2L V8 LT2 gasoline engine found in the Corvette Stingray. In order to accommodate the special camshaft, the pistons, valves, and cylinder heads are tweaked from the L8T. All told, the naturally aspirated 6.6L V8 L8P gasoline engine features a higher rev limit than the L8T at 6,000 rpm and churns out a GM-claimed 523 horsepower and 543 pound-feet of torque. For comparison’s sake, the L8T is rated at 401 horsepower and 464 pound-feet of torque in crate engine form.
It’s worth noting that the L8P requires a minimum of premium unleaded fuel – or 91 octane – while the L8T is content with regular 87-octane gasoline.
By combining the heavy-duty durability of the Silverado HD and Sierra HD trucks with the all-out performance of the C8 Stingray, Chevrolet Performance has created a powerplant that is capable of satisfying many horsepower-hungry enthusiasts. With that in mind, what’s the first vehicle you would swap this engine into, dear reader? Let us know in the comment section below!
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Comments
Airboats
Will fit nicely into my 57 Chevrolet 3100 truck!! 😁😁😁
I’d stuff it into my Buick Rainier. SLEEPER. 😈
1979 Trans Am
I just picked one up for a 76 firebird
I think it would be perfect in a C3 Stingray – likely with some hood adjustments…
I’d stuff the L8p into my 94 Z-28, upgrade my clutch at same time.. just put a new stock one in place of race clutch . Clouds of blue predicted . haha.
would look great in my miata
My 82 londbed s10
Or better yet my 1978 TransAm that has a 6.6L in it already. I would love that swap!
Love it in my 70′ C10 pickup..Just love big horsepower..
I’d put it in my 66 Caprice
It will fit my 67 stepside c10 pickup
I would put the the L8T into my 2022 Chevy Colorado. It already has the V6 so I think there would be just enough room for the V8.
1985 K5🇺🇸
Sounds like this engine with a procharger bolted up to the front of her would slip right in my c5 vette..funny be wooping the hell out of hell kittens/ c8/ and.of course musturds of course with little money compared to 100k+ junk forsale i just mentioned. 😂🤣
2021 GMC Sierra regular cab longbed 4×4. I inherited this truck from my father so it will be with me forever. However, I would love to replace the 5.3 with this monster so Dad’s hauler can haul ass!!!! 😁
will that engine fits in my C3 454 Corvette . any alterations ?
I’d stuff the L8p into my 94 Z-28, upgrade my clutch at same time.. just put a new stock one in place of race clutch . Clouds of blue predicted . haha.
Seems like my wife’s 2020 Cadillac XT6 could use this lil beauty.
I gotta 86 Shortbox fully loaded GMC Sierra Classic with a 4 speed manual… that would look real good in it..only it’s all original, I couldn’t do it.
Sure you could … it’s called a resto-mod, and they’re all the rage these days! Some sell for quite large amounts when done right.
Definitely in my 1978 Pontiac Trans Am 6.6L- Bandit Edition. Swapping an old smog and emissions choked 400 c.i. that produced depressingly low horsepower and torque numbers for a brand new, state of the art 400 c.i. that would fit beautifully under that screamin’ chicken emblazoned and fully functional shaker hood and give this iconic automobile the balls it deserves to truly be great and achieve it’s full potential as a real American muscle car. It would just be so awesome!!!
BOWTIE POWER !!!
Many thanks GM.
Out with the 396 mill and in with the L8P in my 66 Impala, also, the 3 on the tree got to go!
My 87 IROC-Z
In my Chevy chevette and then ad a pro charger
OMG. In my 2024 12 passenger GMC SAVANA!!
Please, please, please make this engine available as an option for all L8T powered vehicles in your line up. I love this country.
Stuff it in my 03 Camry
My 86 SS Monte Carlo
I’d put it in your mom! Let go Brandon!
Straight into my 454SS…. Is where 1 of those Needs to Go.. Oddly enough, It sounds exactly like my Atchison Racing Engine Built AMC 401.
Install it in 71 Chevelle SS…update the current 406 cu in 450hp sbc 400 torque monster with the L8P…make it so it can run on 105 octane E85 flex-fuel and wuugggahhhh!!… put all the JunkStangs to rest like I did back in the early 90s… thanks ✌️ DTM DanTheMan
2024 2RS Trax!!!
Would have to do some modifications, but I’d like to see that my 2014 impala