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Choosing a Sprint Car Body Package: Fiberglass vs. Cup Carbon vs. Prepreg

In sprint car racing, every decision is a trade between top-side weight, stiffness, durability, and budget. Bodywork isn’t decoration - it’s an aerodynamic system that needs to hold its shape at speed, install clean, and survive the contact that comes with real racing.

Five Star offers three sprint car body packages - Fiberglass Composite, Cup Carbon Composite Blend, and Prepreg Carbon Fiber - so you can choose the material that fits your class, your program goals, and how hard you race.

For a full breakdown of body styles, fitment, and what to look for before you buy, start with The Ultimate Guide to Five Star Sprint Car Bodies & Kits.

The Three Sprint Car Body Kit Options at a Glance

We don’t do “one size fits all.” These are three engineered material options built around the same refined sprint car shape and fitment approach - just tuned for different performance and cost targets.

Feature	Fiberglass Composite	Cup Carbon Blend	Prepreg Carbon Fiber
Ideal Class / Program	305 / Budget-Focused	360 / High-Volume Racer	410 / Performance-First
Complete Package Price	$1,828*	$3,229*	$5,043*
Weight Profile	Heaviest Option. Provides a planted, stable feel for predictability.	Mid-Range. Meaningful savings over fiberglass without the premium cost.	Ultra-Light (<18 lbs). Maximum response and tuning flexibility.
Material Tech	Advanced composite with Kevlar-reinforced mounting points.	NextGen Cup Car Blend. Kevlar/Aramid used throughout with flame-retardant materials.	Aerospace Autoclave Cured. Class A cosmetic look with unmatched stiffness-to-weight.
Durability Focus	Impact & Scrub. Best value durability with the most economical replacement path.	Abuse Tolerant. Superior impact resistance built for weekly racing contact.	Stiffness. Maximum rigidity to minimize deflection for aero consistency.

*Pricing subject to change.

The table shows that all three kits share the same engineered shape and safety baseline, but you’re choosing between cost, weight, and stiffness - from the durable Fiberglass workhorse, to the balanced Cup Carbon hybrid, to the ultra-light Prepreg performance option.

What’s Included in Each Body Package

Each complete package is the same core set of panels - only the composite material changes:

High-Impact Plastic Nose
Hood
Dash
Right Arm Guard
Left Sail Panel

That matters, because you’re comparing equivalent coverage - not “one kit includes more parts.”

The Common Thread: High-Impact Plastic Nose

All three sprint car body packages use the same high-impact thermoformed plastic nose for a reason: it’s built for flexibility, durability, and consistent shape. It’s engineered to withstand contact and resist damage while maintaining smooth airflow and reliable fit - season after season.

On-Track Behavior: Weight, Stiffness, and Aero Consistency

When conditions change, your body’s weight and rigidity influence how quickly the chassis reacts, and how consistently the aero surfaces stay true.

Factor	Fiberglass Composite	Cup Carbon Composite Blend	Prepreg Carbon Fiber
Top-Side Weight	Heaviest option. A planted, stable feel, especially helpful when you value durability and predictability.	Mid-range. Meaningful savings over fiberglass without the full premium jump.	Lightest option. Less than 18 lbs total package weight for maximum response and tuning flexibility.
Shape Control at Speed	Strong stiffness for the money with consistent fit.	Built for high-speed stability and tough conditions; excellent stiffness with impact resistance.	Maximum stiffness-to-weight. Built to minimize deflection for the cleanest aero consistency.
Driver Feel	More forgiving and confidence-inspiring for many programs.	Balanced and versatile across a wide range of track conditions.	Fast, direct response - best for teams chasing every advantage.

Each sprint car body package shifts the car’s response and aero stability - Fiberglass stays planted and forgiving, Cup Carbon balances weight savings with toughness, and Prepreg delivers the quickest reaction with the most consistent shape control.

The Engineering Behind the Shape (Why It Works)

This sprint car body wasn’t guessed at. The shape was developed using advanced CFD (computational fluid dynamics) to model airflow and optimize aerodynamics before molding. Those findings were then validated on-track using sensors and data collection, including a clear polycarbonate hood that allowed engineers to see air movement in real time and turn that data into proven results.

Modularity Wins Races

Regardless of material, Five Star sprint car body panels are built for consistent fit, quick installation, and easy panel replacement. You don’t have to replace the whole body just because one panel takes a hit. You swap the panel and get back to racing.

The Verdict: Which Package Fits Your Program?

305 / Budget-Focused Program: Fiberglass Composite
Strong, consistent, and built to take abuse - without forcing compromise on the rest of the race budget.
360 / High-Volume Racer: Cup Carbon Composite Blend
A clear step up in weight and durability with a professional finish and proven material pedigree.
410 / Performance-First Program: Prepreg Carbon Fiber
When you’re chasing every advantage, top-side weight is a penalty. This is the package built to minimize it.

Frequently Asked Questions

What’s included in each Five Star sprint car body package?

How do I choose between Fiberglass Composite, Cup Carbon, and Prepreg Carbon Fiber?

Will these sprint car body packages fit my chassis without major fabrication?

The Five Star Advantage

All three sprint car body packages are designed to bolt onto Maxim, Triple X, Schnee-Lawson, JR-1, J&J, DRC, Spike & more with minimal fab work. Same refined shape. Same fitment focus. Same safety-minded material approach (including built-in flame retardant panels). The only question is how far you want to push weight and stiffness.

Don’t let bodywork cost you speed.

Build your custom sprint car body package