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Valves, Guides, Valve Springs & Caps - MGB
The selection of valve springs is made by taking into account the combined specifications of the valves, camshaft and rocker gear; once again it is felt that the point must be stressed about taking the utmost care and attention when choosing and assembling these components on an engine.

The road uprated springs are designed for use with standard ratio rocker arms and any of the camshaft profiles up to, but not including, the racing types. They will help to improve power in the usable rev. range, while not being so strong that they might affect reliability. They are designed to be used with alloy valve caps but can also be used on pre-18V engines with the early double spring type valve caps.

Road Uprated Valve Springs
Moss Special Tuning's design of uprated valve springs are made to suit the range of camshafts together with standard ratio rockers and are usable up to 7000rpm; they are supplied as a set of 8 double springs.
On 18V engines (with single springs as standard) alloy walve caps are definitely required (see below).

Competition Uprated Valve Springs
These are suitable for the 'B' series engine when a high lift cam and high ratio roller rockers are used. They are supplied as a set of 8 double springs and in a conscientiously built engine can be used up to 8000rpm, they must be used with alloy valve caps (see below).

Valve Caps
Weight reduction of all reciprocating components within an engine is vital to the fuel efficiency; the lighter a component, the less power will be lost through friction and heat. For this reason, along with the benefits of less stress and wear on related components, Moss offer lightweight valve caps. These aluminium caps are approximately half the weight of the standard steel caps, while also being stronger. They are designed to match the later type of valves and must be used only with double valve springs; they are supplied individually.

Part #DescriptionApplicationPriceQty
Rqd		Qty 
TMG10716
Valve Cap, lightweight aluminium
Note: Sold individually
£5.15
€5.92 		8
TMG10707
Valve Spring Set, road uprated
Note: Set of 8 double springs
£36.25
€41.69 		1
TMG10708
Valve Spring Set, race/competition uprated
Note: Set of 8 double springs
£55.66
€64.00 		1
12H435
Inlet Valve, Standard 38mm
Early £7.75
€8.91 		1
12H2520
Inlet Valve, Standard 41mm
Late £6.25
€7.19 		1
TMG10734
Inlet Valve, Gas Flowed, Enlarged 44mm
£25.96
€29.85 		1
12H436
Exhaust Valve, Standard 34mm
Early £6.95
€7.99 		1
CAM1717
Exhaust Valve, Standard 34mm
Intermediate £5.45
€6.27 		1
12H4211
Exhaust Valve, Standard 34mm
Late £4.55
€5.23 		1
TMG10715
Exhaust Valve, Gas Flowed, Standard 34mm
£10.66
€12.25 		1
TMG10735
Exhaust Valve, Gas Flowed, Enlarged 36.8mm
£26.50
€30.47 		1
TMG10719
Valve Guide Set, Bronze
£59.26
€68.14 		1