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On-Demand CNC Platform

CNC Machined
Aftermarket
Performance Parts

We machine billet fuel rails, catch cans, turbo flanges, intake spacers, throttle body spacers, and shift knobs from billet aluminum 6061, 7075, and stainless steel. Prototype to production runs for aftermarket brands.

Securely upload your 3D CAD file for immediate pricing and DFM feedback.

$51B+
US automotive aftermarket
market by 2025
SEMA Market Report 2024
160M+
Modified vehicles
in the US
SEMA Industry Data
±0.001"
Standard tolerances
on aftermarket parts
RivCut capability
5-Day
Typical prototype
turnaround
Standard lead time

Billet Performance Parts from Your CAD File

Aftermarket performance parts demand precise O-ring grooves, leak-free fluid passages, and consistent cosmetic finishes. A fuel rail with an injector bore that is off by 0.002" leaks fuel under boost pressure. We machine billet aluminum 6061-T6, 7075-T6, and stainless steel to tolerances as tight as ±0.0005". Every part is dimensionally inspected and ready for your product line.

1

Billet Materials

We machine billet aluminum 6061-T6 for fuel rails, catch cans, and intake spacers. 7075-T6 for turbo flanges. 304 stainless for exhaust-side components. Titanium for shift knobs.

2

Fluid-Tight Precision

We hold ±0.0005" on O-ring grooves, injector bores, and sealing surfaces. Your fuel rails and catch cans seal perfectly under boost pressure and vibration.

3

Finish-Ready Quality

Parts machine to anodize-ready surface quality. No secondary cleanup needed. Color anodize, bead blast, polish, and brushed finishes available for retail-ready products.

Aftermarket Performance Parts We Produce

Fuel rails, catch cans, turbo flanges, and more.

Billet Fuel Rails

Billet aluminum fuel rails with precision injector bores, O-ring grooves, AN fitting ports, and mounting tabs. Single and dual rail configurations for any engine platform. Fuel-safe anodize available.

Injector bore precision

Catch Cans

Billet aluminum oil catch cans with internal baffle features, AN inlet and outlet ports, drain plugs, and mounting brackets. Sealed construction with precision O-ring grooves for leak-free operation.

Internal baffle features

Turbo Flanges

Turbo inlet, outlet, and wastegate flanges from stainless steel and billet aluminum. Precision bolt patterns and gasket surfaces for leak-free turbo system installations. T3, T4, and V-band configurations.

T3, T4, V-band configs

Intake Spacers

Billet intake manifold spacers with precise gasket surfaces and runner alignment. Phenolic and aluminum options for thermal isolation and plenum volume optimization.

Gasket surface precision

Throttle Body Spacers

Billet aluminum throttle body spacers with precision bore matching, gasket surfaces, and vacuum port taps. Helical and ported designs for improved air flow characteristics.

Bore-matched precision

Shift Knobs

Billet aluminum, stainless steel, and titanium shift knobs with precision thread inserts, weighted options, and custom knurling patterns. Anodize, polish, and brushed finishes for retail-ready products.

Custom thread & finish

Serving the Performance Aftermarket Industry

The US automotive aftermarket is a $51 billion industry, driven by enthusiasts, racing teams, and performance brands building products for modified vehicles.

Every aftermarket brand needs a reliable CNC machining partner for prototyping new products and running production batches. The market demands consistent quality, cosmetic finishes, and the ability to scale from 10-piece prototypes to 5,000-piece production runs.

Whether you are launching a new fuel rail design or scaling production on your catch can line, we want to be your machining partner. Instant AI pricing the moment you upload your file.

SEMA Brands & Exhibitors

Performance parts companies building products for the largest automotive aftermarket trade show. Need fast prototypes before SEMA and reliable production after launch.

Turbo Kit Builders

Companies building complete turbo kits need consistent flanges, intake piping adapters, and blow-off valve mounts. Repeat orders with tight tolerances for bolt-on fitment.

Fuel System Specialists

Fuel rail and fuel system companies need precision injector bores, O-ring grooves, and AN fitting ports. Every bore needs to be identical for consistent fuel delivery.

E-Commerce Performance Brands

Online performance parts retailers selling direct to enthusiasts. Need retail-ready finishes, consistent quality, and the ability to scale production as demand grows.

Built for Aftermarket Brands

Aftermarket parts need a shop that understands cosmetic quality, product consistency, and production scaling.

Anodize-Ready Surfaces

Parts machine to smooth, consistent surfaces ready for color anodize without secondary cleanup. Your products look retail-ready straight from our shop.

Prototype to Production

Start with 5 prototypes for fitment testing. Scale to 500 or 5,000 pieces for your product launch. Same shop, same quality, same contact person.

Fluid-Tight Machining

O-ring grooves, injector bores, and AN ports machined to tolerances that seal under boost pressure. No leaks, no rework, no warranty claims.

Fast Prototype Turnaround

Get your new product to market faster. Prototype parts in 5 to 7 days so you can test fitment and get to SEMA on time.

Certifications & Standards
In Progress
IATF 16949
Automotive quality management standard. We are building our QMS toward this certification. Documentation follows the structure now.
Active
NIST-Traceable Gauges
All measuring equipment calibrated to NIST standards on regular cycles. CMM, micrometers, and bore gauges.
Active
Material Certifications
Every order ships with mill certs and heat lot traceability. Full records for your audit trail.
Planned
PPAP
Production Part Approval Process documentation. On our roadmap for automotive OEM supplier requirements.

Questions about our quality setup? Email us — we will send our documentation package.

From CAD File to Billet Part in 3 Steps

Simple process built for aftermarket brands and performance builders.

Step 1

Upload & Quote

Send your STEP or IGES file. Pick your material, quantity, and finish. Our AI gives you a real price right away. Free DFM check included.

Step 2

We Machine & Inspect

Your aftermarket parts run on our CNC mills and lathes. Every order gets dimensional inspection on injector bores, O-ring grooves, and cosmetic surfaces.

Step 3

Ship with Full Docs

Parts ship with dimensional inspection reports, material certs, and any documentation you need. Ready for your anodizer, packaging, or direct to your customer.

Aftermarket Performance Questions

We machine intake spacers, billet fuel rails, catch cans, shift knobs, throttle body spacers, and turbo flanges. Upload your STEP or IGES file for instant AI pricing.
We machine billet aluminum 6061-T6 for most aftermarket parts. 7075-T6 for high-stress turbo flanges and brackets. 304 and 316 stainless steel for exhaust-side components. Titanium for lightweight shift knobs.
Yes. We machine billet aluminum fuel rails with precision injector bores, O-ring grooves, fuel inlet and outlet ports, and mounting tabs. Single and dual rail configurations for any engine platform.
We hold ±0.001" on general features and ±0.0005" on injector bores, O-ring grooves, and gasket surfaces. Every part is dimensionally inspected before shipping.
Yes. We machine turbo inlet and outlet flanges, wastegate flanges, and exhaust adapter plates from stainless steel and mild steel. Precision bolt patterns and gasket surfaces for leak-free sealing.
Most aftermarket parts ship in 5 to 7 business days. Rush orders on simpler parts like spacers and shift knobs can ship in 3 to 4 days. Tell us your launch timeline.
We offer anodize Type II in multiple colors, hard anodize Type III, bead blast, polish, brushed finish, and powder coat prep. Color anodize is popular for billet fuel rails and catch cans.
Upload your STEP or IGES file at rivcut.com/quote. Select material, quantity, and finish. Our AI prices it instantly. For production runs of aftermarket parts, email [email protected].

Aftermarket Performance CNC Machining by City

We serve aftermarket brands and performance builders in cities across the US.

Upload Your Aftermarket Part CAD File

Fuel rails, catch cans, turbo flanges, intake spacers — we machine them all. Get instant AI pricing now. Prototypes ship in as few as 3 days.

No minimums · 100% Made in USA · Never brokered · Ships anywhere in the US

AI price estimates are usually within ±20% of final price. Complex parts may get a human review within one business day.

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