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Vatican I states that it is necessary for salvation that men and women not only believe all that is revealed in scripture but also everything which is defined and proposed by the Church as having been divinely revealed. To reject anything taught by the Roman Church is to reject saving faith and to forfeit justification and eternal life:

Further, all those things are to be believed with divine and Catholic faith which are contained in the Word of God, written or handed down, and which the Church, either by a solemn judgment, or by her ordinary and universal magisterium, proposes for belief as having been divinely revealed. And since, without faith, it is impossible to please God, and to attain to the fellowship of his children, therefore without faith no one has ever attained justification, nor will any one obtain eternal life unless he shall have persevered in faith unto the end (Dogmatic Decrees of the Vatican Council, On Faith, Chapter III. Found in Philip Schaff, The Creeds of Christendom (New York:Harper, 1877), Volume II, pp. 244-245).

Ludwig Ott explains the relationship of Dogmas defined by the Church and faith in these words:

By dogma in the strict sense is understood a truth immediately (formally) revealed by God which has been proposed by the Teaching Authority of the Church to be believed as such...All those things are to be believed by divine and Catholic faith which are contained in the Word of God written or handed down and which are proposed for our belief by the Church either in a solemn definition or in its ordinary and universal authoritative teaching. (Vatian I). Two factors or elements may be distinguished in the concept of dogma: A) An immediate Divine Revelation of the particular Dogma...i.e., the Dogma must be immediately revealed by God either explicitly (explicite) or inclusively (implicite), and therefore be contained in the sources of Revelation (Holy Writ or Tradition) B) The Promulgation of the Dogma by the Teaching Authority of the Church (propositio Ecclesiae). This implies, not merely the promulgation of the Truth, but also the obligation on the part of the Faithful of believing the Truth. This promulgation by the Church may be either in an extraordinary manner through a solemn decision of faith made by the Pope or a General Council (Iudicium solemns) or through the ordinary and general teaching power of the Church (Magisterium ordinarium et universale). The latter may be found easily in the catechisms issued by the Bishops. Dogma in its strict signification is the object of both Divine Faith (Fides Divina) and Catholic Faith (Fides Catholica); it is the object of the Divine Faith...by reason of its Divine Revelation; it is the object of Catholic Faith...on account of its infallible doctrinal definition by the Church. If a baptised person deliberately denies or doubts a dogma properly so-called, he is guilty of the sin of heresy (Codex Iuris Canonici 1325, Par. 2), and automatically becomes subject to the punishment of excommunication (Codex Iuris Canonici 2314, Par. I). As far as the content of justifying faith is concerned, the so-called fiducial faith does not suffice. What is demanded is theological or dogmatic faith (confessional faith) which consists in the firm acceptance of the Divine truths of Revelation, on the authority of God Revealing...According to the testimony of Holy Writ, faith and indeed dogmatic faith, is the indispensable prerequisite for the achieving of eternal salvation (emphasis added) (Ludwig Ott, Fundamentals of Catholic Dogma (Rockford: Tan, 1974), pp. 4-5, 253).

This point is further emphasiszed by the Roman Catholic theologian John Hardon in his authoritative and popular catechism:

44. What must a Catholic believe with divine faith?
A Catholic must believe with divine faith the whole of revelation, which is contained in the written word of God and in Sacred Tradition.
45. Can a person be a Catholic if he believes most, but not all, the teachings of revelation?
A person cannot be a Catholic if he rejects even a single teaching that he knows has been revealed by God.
46. What will happen to those who lack ‘the faith necessary for salvation’?
Those will not be saved who lack the necessary faith because of their own sinful neglect or conduct. As Christ declared, ‘He who does not believe will be condemned’ (Mark 16:16).
47. Why is divine faith called catholic?
Divine faith is called catholic or universal because a believer must accept everything God has revealed. He may not be selective about what he chooses to believe (John Hardon, The Question and Answer Catholic Catechism (Garden City: Image, 1981).

Thus, if we ask, what is the content of the Faith defined by the Roman Catholic Church, which all men must embrace to experience salvation, what would the overall doctrines consist of? In addition to the teachings of the major Councils and the Creed, there are additional doctrines which comprise the faith of Roman Catholicism that relate to Mary, the Papacy, the Church, the Sacraments, Justification, Purgatory and the Canon.

To deny any of these teachings and to refuse to embrace them with a positive faith is to come under an anathema and to experience loss of saving faith:

http://www.christiantruth.com/articles/savingfaithandrome.html