Chevy Brings Back Iconic V8 Displacements: The 350, 400, and 409 Are Alive Again
There are numbers in the automotive world that carry more weight than horsepower figures or 0-to-60 times. Numbers like 350, 400, and 409 don't just describe engine displacement — they evoke decades of American muscle, racing heritage, and the unmistakable sound of a V8 at full throttle. For gearheads who feared the internal combustion engine was living on borrowed time, General Motors has some very good news: those legendary cubic-inch figures are back, and they're wearing modern clothes.
GM's latest generation of small-block V8 engines isn't just an engineering update — it's a homecoming. With three distinct displacement options announced for 2027 model year vehicles, Chevy is doubling down on its V8 legacy at a moment when the industry narrative has been dominated by electrification. Here's everything you need to know about what's coming and why it matters.
How It All Started: GM's Next-Gen Small-Block V8 Program
Back in 2023, when the conversation around electric vehicles was reaching a fevered pitch, General Motors quietly confirmed it was developing a brand-new generation of small-block V8 engines. The announcement was met with enthusiasm from performance enthusiasts who had grown uneasy watching automakers pivot aggressively toward EV platforms. After two years of anticipation and carefully managed hype, GM began pulling back the curtain with a major reveal tied to one of America's most storied nameplates.
The first official application of the new engine family came with the announcement of the 2027 Chevrolet Corvette Grand Sport. Slotted between the Stingray and the Z06 in the Corvette lineup, the Grand Sport returns as a "Goldilocks" configuration — not too basic, not too extreme — and it gets a brand-new engine to match its balanced character. That engine is the new LS6, a 6.7-liter naturally aspirated V8 producing a remarkable 535 horsepower.
The 409 Is Back — And It's a Small-Block This Time
If the displacement figure of 6.7 liters seems familiar, it should. Convert it to cubic inches and you land squarely on 409 — the same number immortalized in the Beach Boys' 1962 hit song of the same name. The original 409 was a big-block engine, a powerhouse that helped define the muscle car era and earned an almost mythological status among American V8 enthusiasts.
The new LS6 shares nothing mechanically with that legendary big-block. It's a thoroughly modern small-block design, built with contemporary manufacturing techniques, advanced materials, and fuel-injection technology that the engineers of the 1960s could only have dreamed about. But the displacement overlap is no accident — or at least, it's a coincidence that GM is more than happy to embrace. For a brand so steeped in performance history, having a 409-cubic-inch engine in the new Corvette Grand Sport is exactly the kind of Easter egg that resonates deeply with its core audience.
Performance figures back up the nostalgia with substance. At 535 horsepower, the new LS6 reportedly delivers more torque than any other factory naturally aspirated V8 engine ever fitted to a production car. That is a bold claim and a serious number, particularly for an engine that doesn't rely on a supercharger or turbocharger to get there.
Meet the New 350: The Iconic Small-Block Returns to the Truck Segment
The Corvette may be getting the headlines, but the second member of GM's new V8 family is arguably just as significant for the broader market. The 5.7-liter small-block V8 — 350 cubic inches for those keeping score at home — is making its return to the Chevrolet Silverado half-ton truck lineup for the 2027 model year.
The 350 is one of the most produced and most beloved engine families in automotive history. It powered everything from muscle cars to pickup trucks to boats and marine applications for decades. Its return as a truck engine is a direct response to customer demand and a clear statement from GM that displacement still matters, even in an era of cylinder deactivation and fuel economy mandates.
In the 2027 Silverado, the new 350 will replace the outgoing 5.3-liter L83 V8, stepping in as the base V8 option. The upgrade in displacement alone signals a meaningful improvement in low-end torque — the kind of pulling power that truck buyers actually need when towing trailers or hauling heavy loads.
The New 400: More Power for Silverado's Top-Tier V8
Rounding out the trio is the 6.6-liter V8, which converts to exactly 400 cubic inches. This engine will replace the current 6.2-liter L87 as the top naturally aspirated V8 offering in the Silverado lineup. The 400 is positioned to become the most powerful naturally aspirated V8 available in any factory half-ton pickup truck — another significant milestone for a segment where performance bragging rights translate directly into sales.
It's worth noting a small but important technical detail: the "400" is actually a 6.6-liter engine, not 6.7 liters like the Corvette's LS6. In cubic inches, 6.6 liters rounds to 403, not exactly 400. But as GM engineers have been known to say when discussing the shared architecture of these engines: "same block, bigger holes." The family resemblance is unmistakable, and the slight displacement difference between applications is a function of bore and stroke tuning optimized for each vehicle's specific performance and durability requirements.
Shared Architecture: The "Same Block, Bigger Holes" Philosophy
One of the smartest aspects of GM's new V8 program is the use of a common block architecture across all displacement variants. This approach — producing different engine sizes from the same fundamental casting by adjusting bore diameter and stroke length — is a manufacturing and engineering tradition that dates back to the earliest days of the small-block V8. It reduces tooling costs, simplifies parts supply chains, and allows engineers to share development work across the entire engine family.
For consumers, the shared architecture means that the lessons learned at the top of the performance spectrum (in the Corvette's LS6) trickle down into the truck engines. Better combustion chamber geometry, improved oiling systems, and advanced valvetrain technology developed for a 535-horsepower sports car application don't just stay there — they inform every engine that shares the same foundation.
Why This Matters: V8s Are Not Going Away
The timing of these announcements sends a message that goes beyond engine specifications. At a moment when several automakers have quietly walked back aggressive EV timelines and consumers have expressed continued enthusiasm for internal combustion performance, GM's investment in a new generation of V8 engines represents a significant strategic commitment.
Chevy is betting that the V8 engine — refined, modernized, and more capable than ever — still has a long and valuable life ahead of it. With the 350, 400, and 409 displacement figures back in the lineup, that bet comes wrapped in a layer of heritage that no electric motor can replicate. For the millions of American drivers who grew up with these numbers on valve covers and intake manifolds, that combination of new technology and old soul is about as good as it gets.
What to Expect When the 2027 Models Arrive
The 2027 Chevrolet Corvette Grand Sport with the new LS6 and the 2027 Silverado with both new V8 options are expected to arrive at dealerships in 2026. Pricing details and full specification sheets for the truck engines have not yet been fully disclosed, but the performance targets GM has outlined suggest these will be among the most capable naturally aspirated V8 engines the brand has ever produced for street use.
Whether you're drawn to the 409-cubic-inch Corvette for its sports car pedigree, the new 350 in the Silverado for its workhorse capability, or the 400 for maximum truck performance, one thing is clear: the golden age of the Chevy small-block V8 is far from over. In fact, it may be just getting started all over again.