Hydroboost -What is this fitting?
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
Cruising
Joined: Dec 2005
Posts: 11
Likes: 0
From: Mineville Nova Scotia
On the older hydro boost systems they used an inverted fitting and on the newer style they used the metric fitting with o-rings. I think the part you are looking at is a seat for the inverted style fitting. These were a press fit into the housing of the unit.
Last edited by CM77; Apr 29, 2008 at 03:48 AM. Reason: mis spelling
Team Owner
Joined: Aug 2006
Posts: 24,125
Likes: 15
From: Columbia Missouri
Some close answers, it's just the insert into the port in the back of the power steering pump, the high pressure port, that the tip of the hose end seals against. It's there for the later C3s and C4s that have a different hose end than the early C3s.