Does the 421 Exhaust Manifold for AP1 fit the 2.2L S2000?

Yes. Spoon registers the 421 Exhaust Manifold for AP1 on the AP2 with the 2.2L F22C from 2005 to 2009 as well as on every 2.0L AP1, and Go Tuning lists the 2000 to 2009 model years. US 2004 and 2005 cars, which have the 2.2L in the earlier body, are covered.

Why are the runners not equal length?

Spoon found during bench and road testing that making the runners slightly unequal, combined with a bulge in the collector, gave the best balance of peak power and torque. The design keeps low-speed torque intact and improves the pull on the exhaust ports at high rpm, which helps the cylinders fill.

Is mounting hardware included?

Yes. Go Tuning, the sole US distributor for Spoon, states that the manifold comes with all required hardware. The part ships in a long box of 35 x 20 x 90 cm, and Spoon lists the manifold at 6 kg, which helps when planning how to handle it under the car.

Will it cost low-end torque on the street?

No, by design. Spoon set out to keep low-speed torque unchanged while adding power near the top, and tested that goal on the engine bench and on the road. The S2000 still pulls from low revs, with the gain arriving where the F20C and F22C make their power.

Does the S2000 need a tune with the manifold?

Neither Spoon nor Go Tuning lists a tune as required, and the S2000 can run the manifold on its factory engine management. Spoon publishes no dyno chart, so BA quotes no horsepower gain. A tune can be added later if the rest of the engine is developed.

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Description

Spoon Sports 421 Exhaust Manifold for AP1 / AP2 Honda S2000

The Spoon Sports 421 Exhaust Manifold for AP1 and AP2 Honda S2000 was built for owners who want peak power and torque in balance rather than one at the expense of the other. Spoon reached that balance the hard way, working through pipe diameters, merge order and other variables in countless combinations on the engine bench, the flow bench and the road. Two details came out of that work: a bulge in the collector and runner lengths made slightly unequal on purpose. Together they keep low-speed torque where it was, then at high rpm help pull exhaust from the ports, which improves how fully the cylinders fill on the next cycle. Spoon describes the result plainly as an exhaust that genuinely adds power, and it trimmed weight along the way. Go Tuning, Spoon’s US distributor, says all required hardware is supplied. On an S2000 that already revs to the sky, this manifold suits the owner who drives near the limiter on track and still wants the car to pull cleanly out of slow corners.

Features

4-2-1 layout balancing peak power and torque
Bulged collector developed through bench testing
Deliberately unequal runner lengths
Improved scavenging at high rpm
Lightweight construction
Mounting hardware supplied, per Go Tuning

What’s Included

421 exhaust manifold
Mounting hardware

Applications

Honda S2000: AP1 | 1999-2005 | 2.0L F20C
Honda S2000: AP2 | 2005-2009 | 2.2L F22C

Notes

Spoon registers the 421 Exhaust Manifold for AP1 on both the 2.0L F20C and the 2.2L F22C, so US cars with the larger engine are covered
Spoon lists the manifold at 6 kg and publishes no power figures for it
Spoon builds all of its exhaust manifolds with a step-free joint at the ports and TIG welding

Frequently Asked Questions

Does the 421 Exhaust Manifold for AP1 fit the 2.2L S2000? Yes. Spoon registers the 421 Exhaust Manifold for AP1 on the AP2 with the 2.2L F22C from 2005 to 2009 as well as on every 2.0L AP1, and Go Tuning lists the 2000 to 2009 model years. US 2004 and 2005 cars, which have the 2.2L in the earlier body, are covered.
Why are the runners not equal length? Spoon found during bench and road testing that making the runners slightly unequal, combined with a bulge in the collector, gave the best balance of peak power and torque. The design keeps low-speed torque intact and improves the pull on the exhaust ports at high rpm, which helps the cylinders fill.
Is mounting hardware included? Yes. Go Tuning, the sole US distributor for Spoon, states that the manifold comes with all required hardware. The part ships in a long box of 35 x 20 x 90 cm, and Spoon lists the manifold at 6 kg, which helps when planning how to handle it under the car.
Will it cost low-end torque on the street? No, by design. Spoon set out to keep low-speed torque unchanged while adding power near the top, and tested that goal on the engine bench and on the road. The S2000 still pulls from low revs, with the gain arriving where the F20C and F22C make their power.
Does the S2000 need a tune with the manifold? Neither Spoon nor Go Tuning lists a tune as required, and the S2000 can run the manifold on its factory engine management. Spoon publishes no dyno chart, so BA quotes no horsepower gain. A tune can be added later if the rest of the engine is developed.

About Spoon Sports

Spoon Sports was founded in 1988 in Suginami, Tokyo, by Tatsuru Ichishima, a former Honda race car tester and driver, with backing from Honda and Mugen. The company has raced Hondas from its first season, when Ichishima’s own Civic became the first Civic to enter the Japan Touring Car Championship, and its Type One workshop, opened in 2001, services and tunes the cars its parts are developed on. Spoon builds engine, drivetrain, exhaust, chassis and aero parts for Honda models and proves them on circuits and in endurance racing, including the 25 Hours of Thunderhill.

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Shipping Policy

Items that are in stock in the US, either at Bulletproof’s warehouse or at a supplier’s warehouse, are generally delivered within 7-10 days. Special order items from overseas take considerably longer. As a courtesy Bulletproof offers delivery estimates to our customers which take into consideration manufacturer availability and shipping schedule. These estimates represent our best guess based on previous orders from the manufacturer and do not in any way imply a guaranteed delivery window. Many manufacturers work in a “just in time” inventory system and often take 2-20+ weeks to produce an item once an order is submitted. All deliverable items are then sent to our Japanese warehouse. Bulletproof ships a minimum of one full ocean freight container every month from Japan, oftentimes more than one a month. Ocean freight takes an average of 4 weeks. Typically it breaks down to one week in Japan for paperwork and customs, two weeks by boat and one week in US customs/clearance. Due to the wide number of variables between manufacturer and shipping schedules, delivery estimates are simply just that – estimates. We attempt to estimate conservatively and we usually deliver faster than our estimates suggest. It is not Bulletproof’s policy to guarantee delivery time of any special order item, this is impossible for us to do. By ordering you acknowledge that there is no required delivery ETA and an order may not be canceled or altered due to manufacturing or shipping delays, all ETA’s are provided as a best guess only. Please review the full Terms & Conditions here.

BP Pricing Difference

We do pricing a little differently on our JDM brands and we believe in making things simple and clear. No hidden fees or surcharges. Every price you see includes the shipping cost to our office in Los Angeles, California and all the associated taxes/duties/fees for bringing the products into the US. The only shipping you ever pay is from our facility in the US to your location. Be wary of resellers that don’t include the cost of international shipping in their pricing on JDM parts. While we believe we’ll always have the lowest all-in price on JDM products, we offer a price match guarantee for all authentic parts purchased from authorized dealers as well. For many international customers, it’s much more affordable to ship from the USA than from Japan directly, as the air freight and ocean freight costs are typically much less. However, for customers looking to ship directly from Japan outside of North America, or domestically in Japan, we can provide pricing specifically for that scenario. Please do not hesitate to contact us with any pricing questions or concerns. Please email us at sales@bulletproofautomotive.com with any inquiries.

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Spoon Sports 421 Exhaust Manifold for AP1 / AP2 Honda S2000 [18101-AP1-000]

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Spoon Sports 421 Exhaust Manifold for AP1 / AP2 Honda S2000

Features

What’s Included

Applications

Notes

Frequently Asked Questions

About Spoon Sports

Reviews