Speedmaster®
Chevy LS1 LS6 EFI 85mm 3 Bolt Ram Air Intake Manifold [Machined Polished]
![Speedmaster® 1-148-033 Chevy LS1 LS6 EFI 85mm 3 Bolt Ram Air Intake Manifold [Machined Polished]](https://www.speedmaster79.com/core/media/media.nl?id=13465755&c=3959037&h=dIu80f432dL5Pzego8kmvL3tU4rdUzlcfa2gaH4Bd1JH0TZu&resizeid=225&resizeh=50&resizew=50)
Product Information
Specs
| Brand: | Speedmaster |
| Part Number: | 1-148-033 |
| Part Type: | Intake Manifold, Fuel Injected |
| Engine Block Style: | Stock/OEM standard deck |
| Injection Style: | Multi-port |
| Basic Operating RPM Range: | 1,500-6,500 |
| Intake Section Included: | Complete |
| EGR: | No |
| Injectors Included: | No |
| Fuel Rails Included: | No |
| Aftermarket Fuel Rail Required: | Yes |
| Throttle Body Included: | No |
| Throttle Body Bore Diameter: | 85mm |
| Supplemental Bosses Cast-In: | No |
| Supplemental Bosses Machined: | No |
| Runners Included: | No |
| Runners Removable: | No |
| Base Material: | Aluminum |
| Base Finish: | Machined Polished |
| Throttle Body Adapter Material: | Aluminum |
| Throttle Body Adapter Finish: | Natural |
| Quantity: | Sold as a Kit |
| Notes: | Bosses cast-in for nitrous |
Description
The Speedmaster line of manifolds for LSX type engines was designed to provide extra plenum area which is very advantageous on larger displacement versions of the LS1 LS6 and LS2 engines. If you have a punched out LS engine the stock manifold will not be able to do the job. Additionally if you are running a supercharger or turbocharger a plastic manifold will not survive a backfire so our aluminum Elite is your answer. These Manifold is a direct replacement for any LS1 LS2 or LS6 intake. It has an 102MM inlet.
Warranty Information
Prop 65 Warning
Installation Guide
Our AI assistant generates a step-by-step guide for this product — covering installation, maintenance, and troubleshooting.
This AI-generated guide is for general reference only and does not constitute official Speedmaster product documentation. Always verify fitment, torque specifications, and safety requirements before installation.