Aftermarket Performance Tubing & Assemblies

Built for aftermarket brands that live and die on fitment, finish, and consistency.

Overview

Your Name on It. Our Work Behind It.

Aftermarket performance brands live and die on fitment, finish, and consistency. A part that fits perfectly on one unit and slips on the next kills your credibility. Your customers don't know who made the tube. They know who sold it to them.

H-P has been fabricating tubing for demanding applications since 1948. We manufacture intake, exhaust, and turbo piping for aftermarket brands who need production-grade parts without building their own fab shop. You handle the brand. We make sure the parts live up to it.

What You Get

Part-to-Part Consistency

Same bend, same wall, same fit. Run after run.

ISO 9001:2015 Certified

Documented processes, traceable setups, audited quality.

Prototype Through Production

Prove the part short-run, then scale without re-tooling.

Complete Assemblies In-House

Bending, end forming, welding, kitting. One source.

Stainless steel X-pipe crossover assembly for aftermarket exhaust applications

Mandrel-bent stainless exhaust pipes for aftermarket performance kits

By Application

What We Build for Aftermarket

Intake Tubing

Tight radius bends, clean surfaces, and dead-on fitment matter more than anything here. These parts are visible, handled, and installed by customers who notice everything. A wall that thins through the bend, a surface mark that shows through powder coat, a tube that doesn't drop in like the last one did. That's not a quality issue. That's a brand issue.

Turbo Inlet Pipes

Everything here lives under boost pressure. If a connection is off, even slightly, it leaks. And a boost leak isn't something your customer troubleshoots quietly. It's a phone call, a return, and a review that mentions your brand by name. We hold the connection geometry tight enough that the pipe seals the same way on every unit, not just the first one.

Midpipes & Catbacks

Heat cycling, road debris, and vibration all work against these parts. If the bend geometry drifts between runs, you're not shipping one bad part. You're shipping a batch of them, and every one lands on a customer who expected it to fit like the reviews said it would.

Setup data is locked per part number. The 500th piece checks the same as the 5th. That's the difference between a brand that ships confidently and one chasing returns.

Downpipes

Downpipes don't have room to be close. Compound bends, tight radii, and precise flange orientation all crammed into a space where a millimeter of clearance is the difference between a clean install and a customer under the car with a sawzall. A downpipe that fits on the prototype has to fit on unit 200 the same way. We lock the bend sequence and flange alignment so it does.

Chassis & Off-Road

Bumpers, rock sliders, armor brackets, cage components. These parts take impact and they're on full display. A bend that doesn't match the body line or a bracket that sits off the frame is obvious the second the customer steps back and looks at the truck. And if it can't take a hit when it matters, the part failed at the one thing it was supposed to do.

We bend structural tube to hold geometry across production runs so every bumper, every slider, every bracket fits the platform the same way. Your customer shouldn't be able to tell unit 300 from unit 3.

Markets

Who We Work With

Aftermarket brands and distributors across performance automotive segments.

Performance Exhaust

Cold Air Intake

Turbo & Forced Induction

Diesel Performance

Off-Road & Overland

UTV & Powersports

Classic & Restomod

Private Label / White Label

FAQ

Common Questions

Yes. H-P has been fabricating tubing since 1948. We manufacture parts for aftermarket brands who sell under their own name. You handle the design and branding. We handle fabrication, consistency, and delivery. Many of our aftermarket customers started with a single part number and scaled from there.

We bend stainless steel, aluminum, carbon steel, aluminized steel, and specialty alloys. Most aftermarket exhaust work runs in 304 or 409 stainless. Intake and turbo inlet parts are typically 6061 aluminum. You spec the material, we run it.

That's what we do. Mandrel bending gives you consistent wall thickness and clean interior surfaces across every part in a run. If your design calls for specific bead profiles, flange orientations, or tight-radius compound bends, we hold those dimensions part after part.

We run prototype through production volumes. If you're validating a new SKU, we can produce short runs to prove out the part before you commit to larger quantities. Once the part is locked in, blanket orders and scheduled releases keep cost and lead time down.

Every part runs against the same tooling and setup data, verified with go/no-go gauging and CMM inspection when required. Our ISO 9001:2015 system tracks each setup so the 500th part matches the 5th. For brands shipping under their own name, that consistency is the product.

Yes. Beading, flaring, reducing, expanding, and welded assemblies are all in-house. Many aftermarket exhaust and intake parts require specific end forms for slip-fit connections, V-band flanges, or marmon beads. We produce the complete assembly, not just the bend.