The fastest way to wreck a FiveM server's performance isn't a bad script — it's a bloated vehicle pack. A single poorly made car can drop everyone's frames near it, and a pack of fifty of them turns a smooth city into a slideshow. The catch is that none of this is visible on the storefront screenshot. A render looks identical whether the model is a tight 80k-poly add-on or a 400k-poly FPS bomb with 4K textures on the door handles.
This is a buyer's checklist. It covers the one decision that shapes everything — add-on versus replace — what "optimized" actually means under the hood, how to spot a pack that'll tank your frames, and how to vet a vehicle pack before your money leaves your account.
Add-on vs Replace: The Decision That Shapes Everything
This is the first fork, and it affects compatibility, performance and how many cars you can run.
Add-on vehicles load as brand-new spawn names alongside the base GTA fleet. Nothing is overwritten.
- Pros: Base game vehicles stay intact. You can run hundreds of distinct models. Garages, dealerships and job vehicles can reference each one by its own spawn name. This is what almost every serious roleplay server uses.
- Cons: Each add-on is extra content the client streams and holds in memory. More add-ons means a larger streaming footprint, so optimization matters more the bigger your fleet gets.
Replace vehicles overwrite an existing in-game model — your new car spawns wherever GTA would have spawned, say, a Sultan.
- Pros: Zero new spawn names to manage; ambient traffic can use them, which can make the world feel custom without scripting.
- Cons: You're limited to the number of base models, replacements can collide with other resources expecting the original, and conflicts between two resources replacing the same model are a common, maddening source of bugs.
For a roleplay server with garages and dealerships, add-on is almost always the right call. Replace makes sense for ambient/traffic overhauls or when you specifically want NPC traffic to drive your models.
What "Optimized" Actually Means
Sellers throw "optimized" around like it's free. Here's what to actually look for, because these are the numbers that decide your frame rate.
Polygon count. A model's triangle count is the headline cost. A well-built car sits in a sane range; a "ported from another game" rip can be several times heavier with detail nobody sees at gameplay distance. High poly counts hurt most when several of those cars are on screen at once — exactly what happens at a car meet.
LODs (Levels of Detail). Proper models ship multiple LODs — progressively simpler versions that swap in as the camera pulls back. A car with broken or missing LODs renders at full detail across the entire street, which is a classic FPS killer. Missing LODs are one of the most common defects in cheap packs.
Texture sizes. Textures should be sized to what's visible. A 4K (4096×4096) texture on a wing mirror is pure waste — VRAM and stream budget spent on pixels nobody sees. Good packs use sensible resolutions and compressed formats; bad ones ship every part at maximum size.
_hi models. GTA's high-detail variant (the _hi.ytd/_hi.yft files) loads when you're close. Optimized vehicles have a properly built _hi model; some packs either bloat it or omit it. It's a small detail that signals whether the author knew what they were doing.
Embedded vs streamed assets. Cleanly packaged vehicles keep textures and meta where they belong so the resource streams predictably. Packs with duplicated or embedded-everywhere assets balloon your server's stream folder and load times.
Spotting an FPS-Killer Pack Before You Buy
You usually can't open the files pre-purchase, so judge on signals:
- Vague or absent specs. A seller who lists poly counts, texture resolutions and confirms LODs is telling you they optimized. Silence on all of it is a red flag.
- "50 cars for $15." Bulk dumps of ripped models are rarely cleaned up individually. Quantity in the title, no specs in the body.
- No mention of LODs or
_hihandling. If the description never touches detail-distance behaviour, assume it wasn't handled. - Reviews mentioning frame drops or "lag near the car." Trust other server owners' frame reports over the screenshots.
- Game rips with no optimization pass. A model lifted from another title looks great and runs terribly unless someone rebuilt the LODs and retextured it for GTA.
Handling, Balance, and Compatibility
Performance isn't only frames. A vehicle's handling.meta determines how it drives, and lazy packs ship copy-paste handling that makes a hatchback corner like a supercar — a balance problem on any server with chases or racing. Check that handling is bespoke per vehicle, not duplicated.
Then confirm it fits your stack. Your framework and garage system (ESX, QBCore, Qbox and the rest) needs each vehicle registered with correct spawn names, classes and prices, and your dealership/garage scripts have to recognise them. A pack that doesn't slot into your vehicle tables means manual config work for every car. Check that liveries and extras are wired up too — extras for spoilers/livery variants and proper livery slots are what make a car worth its stream cost.
Licensing, Escrow and Fleet Size
Buy from legitimate, authorised stores so you get a real license and update path — not a leaked re-upload that breaks on the next artifact update and gives you no support. Many paid vehicles ship under Cfx.re's escrow protection; know whether what you're buying is escrow-locked or open, since that affects what you can edit (handling tweaks, price, spawn names).
Finally, the question owners forget: how many cars should you actually run? Far fewer than you'll be tempted to. Every add-on is permanent client download and stream budget. A focused fleet of well-optimized, well-chosen vehicles beats a thousand-car dump that takes ten minutes to join and stutters at every meet. Curate ruthlessly.
Where to Buy and What to Read Next
Source vehicles from stores that publish real specs and back their packs with updates. The curated vehicle catalogue at cars-tebex.io is built around exactly the optimized, framework-ready packs this guide describes, and for the wider MLOs, maps and supporting assets your fleet sits inside, browse assets-tebex.io. When you need the garage, dealership and vehicle-management scripts that turn a pack into a working in-game fleet, the systems at scripts-tebex.io are where those pieces live. Vet first, buy specced packs, and keep the fleet lean — your frame rate is a finite budget, so spend it on cars players actually use.
