Rothsport Racing

What Rothsport Racing does

Rothsport Racing is a Sherwood, Oregon-based boutique automotive specialist founded in 1998 that focuses on air-cooled Porsche 911 engines and transmissions. The company rebuilds, restores, and custom-builds powertrains ranging from stock restorations through mild power updates to bespoke race-spec and series-production engines, and also restores or customizes complete street and competition cars. Its expertise spans Porsche flat-six and flat-four engines, with racing pedigree at venues from Portland International Raceway to Le Mans and the NORRA Mexican 1000 in Baja.

The company's product surface combines a proprietary aftermarket parts catalog with bespoke engineering services. Catalog products include billet aluminum short shifters, crankshaft and accessory pulleys, oil inlet check valves, quick-release steering hubs, racing wheels, and chassis components, plus EB Motorsport fiberglass body panels distributed under partnership. Rothsport's most differentiated offering is its intake system family, developed over more than two decades by founder Jeff Gamroth for a broad range of Porsche flat-six street and competition variants. The firm has co-developed high-output engines with restomod manufacturers, including a 455 hp naturally aspirated 4.0L flat-six and an 840 hp twin-turbo 4.0L flat-six with Gunther Werks, and a 260 hp 2.6L flat-four with Emory Motorsports.

The business operates on a hybrid commercial model. Engine building, transmission rebuilding, and full car preparation are commissioned through direct consultation with high-net-worth collectors and boutique restomod manufacturers, priced on a quote basis. Components are sold direct-to-consumer through a Shopify-powered e-commerce storefront (rothsport.com) supporting multi-currency global checkout, with unit prices ranging from roughly $50 for shift knobs to over $2,000 for items such as fiberglass fan shrouds and billet short shifters. Distribution is direct; no third-party resellers or dealers are referenced. The company is privately held, founder-led (Jeff Gamroth), employs 1-10 people, and has no disclosed institutional capital, parent company, or M&A history.

Name

Rothsport Racing

Legal name

Rothsport Racing

Website

https://rothsport.com

Company type

Private

Founded year

1998

Operating status

Operating

Headcount range

1–10 employees

Short description

Rothsport Racing is a Sherwood, Oregon boutique builder founded in 1998 that specializes in air-cooled Porsche 911 engine and transmission work and proprietary aftermarket parts. It serves premium restomod manufacturers such as Gunther Werks and Emory Motorsports alongside individual Porsche enthusiasts.

Ownership category

akta.pro rank

Product category

Performance Auto Parts Manufacturing

NAICS

Motor Vehicle Gasoline Engine and Engine Parts Manufacturing (336310), Automotive Parts and Accessories Retailers (441330), Other Motor Vehicle Parts Manufacturing (336390)

SIC

Wholesale-Motor Vehicle Supplies & New Parts (5013), Wholesale-Motor Vehicles & Motor Vehicle Parts & Supplies (5010)

akta.pro primary industry

Performance, racing & tuning parts distribution (CRAOANAH)

Keywords

• Porsche engine building
• Aftermarket auto parts
• Performance car restoration
• Transmission rebuilding
• Custom fabrication services

Headquarters

HQ city

Sherwood

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2C

Offering type

Hardware or Manufacturing

Cost components

Personnel, Operations, Supply Chain, Technology or R&D, Marketing or Sales

Revenue model

1. Custom Engine and Transmission Building: Bespoke engine and transmission building services for high-performance street and racing Porsche vehicles, ranging from stock restoration to race-spec and series-production builds.
2. Parts and Components Sales: Sale of engine components, transmission components, and chassis components through the Rothsport catalog, including billet short shifters, pulleys, oil inlet check valves, quick releases, and steering components for 911 vehicles.
3. Car Preparation and Restoration: Tasteful customization of street cars or restoration of works cars to former glory, including full Porsche Street and Competition car preparation and remastering.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels4 records

Core offering

Rothsport Racing specializes in air-cooled Porsche engine and transmission building, offering services ranging from stock restoration and mild power updates to one-off customs, race-spec, and bespoke series-production engines. The company also designs and sells a proprietary catalog of aftermarket performance parts for Porsche 911 applications, including billet short shifters, pulleys, intake systems, oil inlet check valves, quick releases, and chassis components. Operations are conducted from a single shop in Sherwood, Oregon.

Product overview

Rothsport Racing is a Porsche-focused specialty builder offering two core areas: custom engine and transmission building/restoration services for air-cooled Porsche 911s, and a portfolio of proprietary aftermarket performance parts. The parts catalog includes Engine Components (crankshaft pulleys, oil inlet check valves, sensors), Transmission Components (billet short shifters), Chassis Components (steering hubs, racing wheels, rack braces), Rothsport Intake Packages developed by Jeff Gamroth, EB Motorsport fiberglass body parts, and specialized components like Quick Releases and Billet Pulleys. The company serves both street and racing Porsche enthusiasts, with trusted relationships with companies like Emory Motorsports and Guntherwerks.

Differentiator

Problem solved

Functional benefit

Products and services

• Engine Building and Restoration Services Custom air-cooled Porsche engine and transmission building services ranging from stock engine restoration, mild power updates, one-off customs, race-spec builds, and bespoke series-production engines. Targets discriminating Porsche enthusiasts and restomod builders.
• Engine Components Aftermarket engine parts for Porsche 911 models including crankshaft pulleys, oil inlet check valves, chain box covers, sensors, fan pulleys, and engine tin. Sold individually through the Rothsport e-commerce catalog.
• Transmission Components Transmission parts including billet aluminum short shifters, shift knobs, and FD Motorsports components for Porsche 964/993 models.
• Chassis Components Chassis parts including quick release steering hubs, steering wheel adapters, Momo racing wheels, hood prop rods, steering rack braces, and wheel spacers for various Porsche models.
• Rothsport Intake Packages Bespoke intake systems designed by Jeff Gamroth for a broad range of Porsche flat-6 engine street or competition variants. Proprietary designs not available from other suppliers.
• EB Motorsport Collection Fiberglass body components including front and rear bumpers and hoods for vintage 911 models, sourced through the EB Motorsport partnership and resold via the Rothsport catalog.

Quantifiable outcome

• Rothsport-built engines power vehicles winning at major racing events including Le Mans endurance racing and Baja off-road competition.

Named customers2 records

Segments2 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Two partnerships are on record, tiered core.

• Gunther WerkscoreStrategic or Co-development Partner · 23 April 2026Rothsport Racing serves as the engine development partner for Gunther Werks, a California-based boutique Porsche 911 restomod manufacturer. The partnership has produced multiple high-performance engines including a 4.0-liter naturally aspirated flat-six producing 455 hp for the GXR-Evo and a 4.0-liter twin-turbo flat-six producing 840 hp for Project Endgame. Rothsport has earned the trust of Gunther Werks for engine development across their Speedster program and GWX coachbuilding program.
• Emory MotorsportscoreStrategic or Co-development PartnerRothsport Racing builds engines for Emory Motorsports, including a 2.6-liter flat-four engine producing 260 hp for their Porsche 356 restomod projects. The relationship represents trust between specialized builders in the high-end Porsche restomod space.

Scale indicators2 records

Recent moves5 records

Expansion highlights4 records

Broad incumbents

• Ruf Automobile: Recognized as a separate manufacturer, Ruf builds complete high-performance Porsche-based vehicles and engines at much larger scale. Comparable in air-cooled Porsche engine expertise but operates as an established OEM rather than a specialist builder.
• Stoddard Restorations: Long-established US Porsche parts retailer and restoration house. Comparable in selling Porsche parts (including NLA reproduction parts) and restoration services, though at larger scale and broader product breadth.

Regional players

• Manthey Racing: Germany-based Porsche motorsport specialist (now part of Porsche AG) offering race preparation, performance parts, and track support. Comparable in air-cooled and modern Porsche race engineering, though based in Europe with broader OEM ties.
• Kremer Racing: Historic German Porsche race shop and parts manufacturer with deep Le Mans pedigree. Comparable in air-cooled Porsche engine building and race parts catalog, though serves primarily the European market.

Direct peers

• Gunther Werks: California-based boutique Porsche 911 restomod manufacturer. Direct customer and co-development partner of Rothsport; they build the cars, Rothsport builds the engines. Highly comparable niche positioning in ultra-premium air-cooled 911 restomods.
• Tuthill Porsche: UK-based Porsche specialist known for air-cooled 911 restoration, race preparation, and bespoke builds. Comparable in scale, niche focus on air-cooled Porsche, and combination of restoration services with proprietary parts.
• Singer Vehicle Design: Best-known premium Porsche 911 restomod manufacturer. Operates in the same high-end air-cooled 911 niche and competes for the same collector customer base, though Singer in-houses much of its powertrain work. Closest aspirational comparable in scale and brand.
• EB Motorsport: UK-based specialist in 911 race preparation, restoration, and fiberglass body components. Direct technology/integration partner (Rothsport carries the EB Motorsport Collection). Comparable in their shared focus on air-cooled 911 components and race prep.
• Emory Motorsports: Long-established Porsche 356 and early 911 restomod house. Direct customer of Rothsport for engine builds (2.6L flat-four). Operates in the same ultra-premium air-cooled Porsche restomod space and represents the same high-end collector customer.
• Patrick Motorsports: Arizona-based Porsche air-cooled specialist offering engine building, restoration, and aftermarket parts. Comparable in focus on air-cooled 911 powertrains, mix of services and parts, and boutique scale.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat3 records

Key risks4 records

Key highlights5 records

Customer concentration

• YouTubeyoutube.com/channel/UCVuUs15KKtXPxtvHW26uP3g
• Instagraminstagram.com/rothsport_racing
• Facebookfacebook.com/Rothsport

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Rothsport Racing