Skip to product information
1 of 16

The Tuner Store

LS Hi-Ram EFI Manifold - Black GM LS1/LS2/LS6 - 105MM Throttle Body

300-123BK

Regular price $1,213.95
Sale price $1,213.95 Regular price $1,518.95
Shipping calculated at checkout.
Sale
Low stock
Sorry, it's out of stock.

But we can let you know when it's back in.

Payment methods
  • Amazon
  • American Express
  • Apple Pay
  • Discover
  • Google Pay
  • Mastercard
  • PayPal
  • Shop Pay
  • USDC
  • Visa
Shop safely with us

  • Secure Checkout
  • Warranty Backed
  • Genuine Parts
Got a question?
LS Hi-Ram EFI Manifold - Black GM LS1/LS2/LS6 - 105MM Throttle Body

$1,213.95

Description

Holley LS Hi-Ram EFI Manifold - Black GM LS1/LS2/LS6

LS1/LS2/LS6 Cathedral Port EFI for 1 x 105MM Throttle Body

Overview
The Holley GM LS1/LS2/LS6 Modular Hi-Ram Intake Manifold is introduced as a cost effective alternative to fabricated sheet-metal for high-performance applications where induction system height is not limited. Coupling this Hi-Ram intake with the high flowing LS1/LS2/LS6 style cylinder heads has outstanding potential for N/A and forced induction applications at a budget-minded cost. Aggressive, bold, race-bred styling will make bad intentions clear for drag race, muscle car, marine, off-road, sandrails, pulling trucks, track, street-rod applications and more! The base is designed to be modular in configuration to accept a wide range of carbureted and EFI tops and to be attractive to builders and fabricators as the foundation for custom induction systems. Runner length and the tapered cross-section designed to perform well for a wide range of engine configurations EFI fuel rails are machined for -8AN O-ring Fittings with passages large enough to accommodate high fuel flows and dampen pressure pulsations in the fuel system and come standard with EFI Hi-Ram kits. Cast aluminum construction. Intended for use on N/A or forced induction engines in the 6.0 to 7.0+ liter range, max power at 7000-8000+RPM.

*** The front and rear height measurements listed in the Specs section are referencing the overall height with the top plate installed. Please see the diagrams in the product images for other dimensions.

Features:
  • Base Plenum Top Mounting Flange Height ???? 8.42??? to the lifter valley cover flange on engine block.
  • Total Height with 92/105mm EFI Plenum Top ???? 12.32??? to the lifter valley cover flange on engine block.
  • Runner Length ???? 6.58???, As-Cast Runner Cross-Sectional Area ???? Tapered 4.25 in?? to 2.53 in??
  • Throttle Body Flange Location, with 102mm EFI Plenum Top : Height ???? 8.42??? (from engine block lifter valley cover flange), Longitudinal Location ???? 3.84??? (forward from engine block front flange), Angle ???? 25 deg. (down from vertical)
  • Plenum Top Gasket Type ???? 3/32??? Round O-ring Cord
  • Mounting Flange Gasket Type ???? Standard LS3 Molded O-Ring
  • Port Size ???? 2.49??? Height x 1.21??? Wide


Details:
  • Color: Black
  • Construction: Cast
  • Engine: GM LS1/LS2/LS6
  • Finish: Black
  • Front Height: 12.32 inch
  • Fuel System Type: EFI
  • Manifold Type: Hi-Ram
  • Rear Height: 11.00 inch
  • Recommended Use: Forced Induction
  • RPM Power Band: 3500-8000 RPM
  • Warranty: Limited 90 Day


Links
300-123
Instruction Sheet

What's the returns policy?

What items are returnable?(eligible for returns)  

  • 30-day return policy, which means you have 30 days after receiving your item to request a return. 
  •  In unused and resellable items, or defective items. 
  •  In the original packaging with all the tags intact. 

What items and exceptions are non-refundable?  

  • Digital Items like Tuning Credits for HP Tuners
  • Gift cards. 
  • Discounted items (if applicable).  

Damage, loss, or theft issues  

  • If the purchased product is faulty, reach out to us within 7 days of the delivered date. 
  • If the purchased product is loss, or theft, Please collect evidence and contact us immediately.  

Refund solutions  

  • Refund to original payment method.
  • Refund to your shopify store credit.

Refund policy

The Tuner Store accepts returns on new products within 30 days from the date of delivery. Items must be received in their original packaging material and in a new status. Used products or customer damaged products will not be accepted. 

The Tuner Store reserves the right to apply a restocking fee to all returns. The purpose of this fee is to recover operational costs related to the purchase and the customer changing their mind.

When returns are the result of the manufacturer defect as determined by The Tuner Store, the return will not be subject to the above restocking fee. 

How soon will I get my refund?  

  • After your return has been processed, you will receive a refund notice from us and it will take an additional 1-3 business days for the refund to be returned to your original payment method. The refund to the store credit is immediate.
  • If more than 5 business days have passed since we’ve approved your return, please contact us at service@tunerstore.com.

How fast is shipping?

All in-stock items are shipped on the first available business day. Most orders ship on the same or following business day. 

Out of stock items are shipped as soon as they're available. Many items are built to order. Those items will have an average lead time on the product page. 

All items on our website ship for free. However, a restocking fee equal to the shipping charges incurred by us, the seller will apply to all new condition items returned due to a customer changing their mind. 

High value items will require a signature on delivery for your purchase protection. We will only ship to the verified billing address provided with the order.