Stainless steel 4-1 header built to flow exhaust gases efficiently from your B-series engine. Constructed from durable stainless steel tubing with merged collector design. Designed for bolt-on installation at factory mounting points with no modifications needed.
4-1 Merge Design - Individual runners combine into a single collector for optimized exhaust scavenging
Stainless Steel Tubing - Resists corrosion and heat degradation over time
Factory Bolt-On - Uses original mounting locations; no drilling or custom fabrication required
Specs
Material: Stainless Steel
Configuration: 4-1 Merge Collector
Condition: New
Whats Included
Header assembly
Frequently Asked Questions
Do I need a gasket or seal between the header and manifold flange?
Yes. Use a quality header gasket at the engine block connection point. Most builders go with a composite or metal gasket depending on your setup—check your specific engine configuration for the right fit.
Can I run this header with a stock exhaust system, or do I need a cat-back?
This header bolts to factory mounting points, so it'll connect to your existing exhaust downstream. Your current cat-back will work fine, though pairing it with a full exhaust system will let you feel the real benefit of the header's flow improvements.
Should I paint or coat this header before installation?
Stainless steel won't rust, so coating is optional—pure cosmetic choice. If you want a specific finish, ceramic coating or high-temp paint works. Install first, then paint if needed; heat cycling can affect adhesion if you coat beforehand.
* Rates from 0–36% APR. Payment options through Affirm are subject to an eligibility check and are provided by these lending partners: affirm.com/lenders. Options depend on your purchase amount, and a down payment may be required. CA residents: Loans by Affirm Loan Services, LLC are made or arranged pursuant to a California Finance Lenders Law license. For licenses and disclosures, see affirm.com/licenses. For example, a $800 purchase could be split into 12 monthly payments of $72.21 at 15% APR or 4 interest free payments of $200 every 2 weeks.
**Rates from 0%-36% APR. Payment options through Shop Pay Installments, are subject to an eligibility check and are provided by these lending partners: affirm.com/lenders. Options depend on your purchase amount, and a down payment may be required. State notices to consumers https://www.affirm.com/licenses.
